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1·Act like a bird! Act like a duck!

喜欢扮演鸟！喜欢扮演鸭子！

2·Act like a bird.

扮演一只鸟。

3·Like the proverbial canary in a coal mine, the nearly 10, 000 known bird species act as environmental barometers whose populations can appraise the greater well-being of their habitats.

就如谚语所说煤矿里的金丝雀一样，近10,000种已知的鸟类在自然界中扮演着“晴雨表”的角色，它们的数量可以用来评价其栖息地的健康情况。

4·The character was a very nice guy, so he had to act the scene very well so that it look so nice, just like a bird flying.

那个角色是个善良的傢伙，所以他要把角色演绎地非常自然就像小鸟飞翔一样。