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- per bird basis 消化液
- We fed them a proper laying ration and get at least one egg per bird every day (excluding winter when they slow down or stop laying). 我们按适当的产卵数配给量喂养它们，至少每只鸡日产一个蛋（冬天除外，它们生产缓慢或是停止下蛋）。
- The description of cuckoo's crowing has never been stopped, and more than 20 different names are give to the bird based on lengend and its homophonic crowing. 杜鹃多名，至少有二十几个，其命名方式大致有六种，主要根据神话传说和她啼鸣声的谐音。
- Visser says the birds base the laying date at De Hoge Veluwe on early spring temperatures, which, in contrast to late spring temperatures, have not changed in the past 30 years. 维瑟说，侯格维陆威的鸟儿根据初春温度来产卵，而相对于晚春的温度，初春温度在过去30年间并没有改变。
- The penguin is a flightless bird. 企鹅是一种不会飞的鸟。
- The bird sang high and clearly in the tree. 鸟儿在树上清脆地高歌。
- The bird flapped its wings and flew away. 那鸟振翅飞去。
- Diesel is the more economical in fuel on a pound per horse power basis. 以一磅对一马力的比率而言，柴油式在燃料上是比较经济的。
- The bird is building a nest of straw and twigs. 这只鸟在用稻草和小树枝筑巢。
- The bird picked a hole in the ice with its beak. 那鸟在冰上啄出了一个洞。
- The bird caught a bug on the fly. 那鸟在飞行中捉住了一只昆虫。
- The bird settled on the topmost bough. 这只鸟儿在最高的权枝上停了下来。
- I asked him for some money and got the bird. 我向他借些钱，但是碰了钉子。
- The agency places about 2000 secretaries per annum. 该代理机构每年可为约2000名秘书安排工作。
- I saw the bird at the very top of the tree. 就在那棵树顶上我看到那只鸟。
- The bird flies out when he opens the window. 当他打开窗户时鸟就飞出去了。
- It travels thousands of miles per second. 它一秒钟能走几千英里。
- Can you shoot up at the bird on the roof? 你能射中房顶上的那只鸟吗？
- The singer got the bird when she came out on stage. 这位歌手一出现在舞台上人们便以嘘声嘲弄她。
- Can your car make a hundred miles per hour? 你的汽车一小时能开一百英里吗?
