[ti:5]
[ar:英语听力]
[al:BBC美丽中国：走进西藏]
[00:05.75]In late spring,the chilly lake waters are a magnet for breeding birds.
[00:19.91]The crested grebe woos his mate with offerings of weed for her nest.
[00:43.82]Finally the honeymoon suite is ready for action.
[01:08.24]The grebes are joined by the highest flying birds in the world.
[01:11.30]Having spent the winter south of the Himalayas,
[01:17.33]bar-headed geese make the hazardous mountain crossing each spring to breed on the plateau's lakes.
[01:40.73]The geese nest together for safety.
[01:43.06]But so many chicks hatching at the same time means that it can be tricky finding your parents.
[01:53.01]Fortunately, once down at the water's edge, there's enough food for all of them.