3·The sand martin is a brown bird with white underneath.
崖沙燕是一种腹部为白色的褐色的鸟。
—— 《柯林斯英汉双解大词典》
4·The male bird is easily distinguishable from the female.
这种鸟很容易辨认雌雄。
—— 《牛津词典》
5·This species of bird is decreasing in numbers every year.
这种鸟的数量在逐年减少。
—— 《牛津词典》
1·Bird evolved from reptiles, so the first bird must have come out of an egg — laid by a reptile.
禽类是由爬虫类进化而来，所以，第一只禽鸟肯定是从爬虫类孵化的蛋里出来的。
2·Despite efforts to vaccinate and control the population of infected birds, H5N1 is considered firmly entrenched in bird populations across large parts of Asia.
尽管人们努力接种疫苗和控制已感染的禽鸟数量，但H5N1病毒仍顽强地存于亚洲大部分地区禽鸟群内。
3·Avian influenza has caused widespread epidemics in bird population in many parts of the world.
禽流感已逐渐演变成在全球各地禽鸟中散播的疫症。
1·A big bird dog, bolder than others, darted in.
一只大个头猎鸟犬胆子较大，猛扑了上去。
2·But hunters in 41 other states - including Wisconsin, where the bird is the officially designated symbol of peace - have made the mourning dove the most popular game bird in the United states.
但是其它41个州(其中包括官方指定哀鸠为和平象征的威斯康星州)的猎人使哀鸠成为美国最受欢迎的猎鸟。
3·Given that the flight muscles usually contain about 0.35% glycogen by weight, calculate how long a game Bird can fly.
因为通常飞翔肌中含有大约0.35%的糖原，计算猎鸟能飞多长时间？
1·What a queer bird!
多么奇怪的家伙！
2·He is a cautious old bird, but as wise as they make 'em.
他是一个谨小慎微的老家伙，但是非常精明。
3·Believe it or not, the old bird is full of go.
信不信由你，这老家伙充满干劲。
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