useful birds是什么意思 useful birds在线翻译 useful birds什么意思 useful birds的意思 useful birds的翻译 useful birds的解释 useful birds的发音

1. useful birds

1. For that to happen, a bird would have topan its head before it took off, just as a person might move his head to locatethe direction of a sound. And, as Dr Mouritsen found in 2004, that is whatmigrating birds do. What he did not know was whether avian cryptochromemolecules actually do form radical pairs with flavins, and if they do, whetherthose pairs last long enough for a bird to gather useful information when itpans its head.
    为此，就像人会移动头部确定声音方位一样，鸟类在起飞前也会上下或左右移动其头部，而莫里特森在2004年就发现迁徙鸟类都会这么做，但当时他并不清楚鸟类隐色素分子是否与黄素结合成游离基对，也不清楚这些游离基对一旦形成，其持续时间是否足够鸟类在移动头部时获取有用的信息。

2. In this way they are more useful to us than any other birds.
    这样，他们更有益的，我们比任何其他鸟类。

3. UV reflectance from the plumage of birds depends on the submicroscopic structure of feathers, so it can serve as a useful indicator of the health of male birds.
    鸟羽的紫外光反射取决于羽毛的次显微结构，因此可以看成是雄鸟健康状况的有用指标。

4. useful birds

4. Specimens from the Mongolian outbreak in migratory birds should also prove useful in shedding light on these recent developments.
    来自蒙古候鸟中暴发的标本也应证明在阐明这些最近发展方面是有用的。