大卫·艾登堡：大自然的声音 第1集英文字幕下载

　(CHIRRUPING AND ANIMAL CALLS),(SQUAWKING AND CHIRPING),The natural world is filled with sound.,(THUNDERCLAP),(CLUCKING),(BELLOWS AND SCREECHES),(ROARS HOARSELY),But so far,we've been hearing only part of it.,(CHIRRUPS AND CLICKS),(PULSATING SQUEAKS),The most advanced audio technology,can now record soundsthat we can't even hear.,(DEEP VIBRATING HUM),(RATTLING),(WHOOPING CALL),(SOFT CLICKING),(CHIRPS),For some animals,sound is the key to survival.,(BUZZING),(CLICKS AND SQUEAKS),They use sound to hunt...,(FRANTIC SCREECHING),(DEEP GROWLING),...and escape.,(PADDING AND RUSTLING),(SOFT THUDDING),Sound can make the differencebetween life and death.,(SCUFFING),(SCUFFING AND PATTERING),(HISSES),It's time to open your ears,to lifeas you've never heard it before.,(GRUMBLING AND TRUMPETING),(CHIRRUPING AND TWITTERING),(SQUAWKING AND SCREECHING),(DEEP RUMBLING GROWL),(CHIRRUPING),(SQUAWKING AND SCREECHING),(GRUNTING),(CHITTERING AND CROAKING),(CACOPHONY OF ANIMAL CALLS),(SOFT MOANING),(CHIRPS),Dawn on the African savanna.,(GRUNTING),(BELLOWING),(GRUNTING AND BELLOWING),It's the best time of the day,for lions to broadcast their message.,(GRUNTS),(BELLOWS HOARSELY),(BELLOWS HOARSELY),(BELLOWING CONTINUES),As the sun rises,cold air is trapped near the ground.,Because it's denser than warm air,,it allows sound to travel furtherbefore dissipating.,(GRUNTING ECHOES),(GRUNTS),It's a declaration to other prides,of his ownershipof these hunting grounds...,...and the key to hisand his pride's survival.,(RUMBLING GROWL),(BELLOWS),It's one of the greatestacoustic displays of power in nature.,(HIGH-PITCHED BELLOW),(DEEP RUMBLING ROAR),(GRUNTS AND ROARS),(GRUNTS AND ROARS),(GRUNTS),He can be heardup to five miles away.,(RUMBLING ROAR),(DEEP GRUNTING),But even this isn't far enough,to reach the boundariesof their territory.,It spans over 150 square miles.,To defend an areaas immense as this,,the pride must roam and roar.,(SONOROUS RUMBLING ROAR),But some members are too smallto get very far.,(YOWLS),This pride is protectedby three brothers.,Together, they head off on patrol.,A lion's roar sends a clear messageto other prides.,But sound can also be usedin more subtle ways.,(CHIRRUPING),(TWITTERING AND CHIRPING),(LOW BUZZING),(BUZZING CONTINUES),(BUZZING AND HUMMING),(INTENSE BUZZING),This garden is filled with the soundof the buzzing of bees.,It's a sign that the plants have beensuccessful in attracting pollinators,with their brightly-coloured flowers,and seductive smells.,(INTENSE BUZZING),The buzzing soundwe associate with bees,is a by-product created bythe beating wings as they fly.,(BUZZING).
    (BUZZING),But some beestake advantage of their buzz,,and use it,in a surprisingly sophisticated way,,to get to a supply of foodthat others can't reach.,(BUZZING),One such bee lives underground.,(BUZZING THRUM),These are buff-tailed bumblebees.,For the colony to survive,,each worker must collectas much pollen as she can,with which to feed their young.,(CONTINUOUS BUZZING THRUM),Searching for itis a constant preoccupation.,(SOFT RUSTLING),(INTREPID MUSIC),(BUZZING),It's spring in England...,(BUZZING),(SOFT FLUTTERING),(FLUTTERING AND CLICKING),(GENTLE BUZZING),...and she is not the only onein search of food.,Competition for pollen and nectaris high.,And poppies are putting on a show.,Packed full of pollen,,they flaunt it at the topof long filaments called anthers.,(BUZZING),These flowers are a free-for-all...,...and everyoneis seeking a share of the bounty.,(BUZZING),(HARMONIOUS BUZZING),But she doesn't need to competewith other species,if she can finda particular kind of flower.,(SOFT FLUTTERING),She's foundwhat she's been looking for...,(SOFT BUZZING AND FLUTTERING),...a type of nightshade.,(BUZZING),Its flowers are less striking,and, unlike poppies,,its pollen is locked upinside long yellow anthers.,The only way for it to escapeis through tiny holes.,The bumblebee holds the key,that unlocks this treasury of pollen.,Sound.,Locking in her wings,,she uses her flight musclesto vibrate her whole body,,buzzing up to 370 times a second.,(INTENSE BUZZING),This sonic assaultblasts the pollen loose.,(BUZZING CONTINUES),She then grooms the pollendown into sticky sacs on her legs,and flies off to the next flower.,(INTENSE BUZZING),Very few speciescan buzz-pollinate in this way,,so bumblebees have nearly exclusiveaccess to the nightshades' pollen.,(INTENSE BUZZING),The bee's pollination buzzis higher pitched,than that made during flight.,It's the same frequencyas the musical note D.,(HIGH-PITCHED BUZZING),She's like a living tuning fork.,Some buzz pollinatorscan vary their pitch,,fine-tuning itto suit different flowers.,So pollen is releasedin the most efficient way.,Fully loaded,she returns to the hive.,She has successfully used sound,to help secure the pollenher colony needs.,(CONTINUOUS HUMMING),We tend to take bees for granted...,but it's not just plantsthat depend on them, we do too.,Many of our crops rely on pollinators,like bees and other insects.,Worryingly, bee populations,,together with thoseof many other insect pollinators,,are in serious declinearound the world.,And with their numbers plummeting,,both the natural world and our ownfood supplies are in danger.,(CONTINUOUS BUZZING),Bees need our help,and without themand the sound of their buzz,,the future for us allwould look bleak.,(INTENSE BUZZING),Sound provides the keyto this partnership,between bumble bees and plants.,But not all relationships in natureare as harmonious.,(BIRDSONG),(DISTANT BIRD CALLS),The Bahama Islands in the Caribbean.,The sand flats here are the home,of garden eels and razorfish.,(WATER BURBLES GENTLY),(FAINT SQUEAKING),But there is trouble in paradise.,(ECHOEY CLICKING AND SQUEAKING),The sound of approaching danger.,(ECHOEY RHYTHMIC SQUEAKING),It's a cue to hide.,(ECHOEY WHISTLING AND SQUEAKING),(SQUEAKING AND CLICKING),A mixed groupsof spotted and bottlenose dolphins.,(SQUEAKING AND WHISTLING)......