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Not all free-swimming animals stay in one zone-the sperm whale dives to over 500 m (1,650 ft) to feed on squid, returning to the surface to breathe air.

并非所有的自由游泳的动物留在一区抹香鲸潜水超过500米，以捕食鱿鱼，返回地面呼吸空气。

Any of various small livebearers of the genus Gambusia that feed on mosquito larvae and are often used in mosquito control.

食蚊鱼一种食蚊鱼属主食蚊幼虫的卵生鱼，常被用于控制蚊子的生长

Any of various small livebearers of the genus Gambusia that ''.'feed'.'' on mosquito larvae and are often used in mosquito ''.

食蚊鱼一种食蚊鱼属主食蚊幼虫的卵生鱼，常被用于''。

They often feed on skin and gill tissue, but usually only cause problems if found in large numbers.

他们往往饲料对皮肤和鳃组织，但通常只造成问题，如果发现在大量。

Hagfish Any of various primitive, eel-shaped marine fishes of the family Myxinidae, having a jawless sucking mouth equipped with rasping teeth with which they bore into and feed on other fishes.

盲鳗：一种盲鳗科的原始的鳗形海洋鱼种。有一个无颌的吸嘴，嘴里有锉齿，盲鳗用这种牙齿能刺入其它鱼类的身体并以它们为食

To feed on the herbage ofa piece of land.

肥料可改变牧草的组成。

Hesperornis was a speedy swimmer, taking short dives to feed on shoals of fish or other passing food.

它们是快速的游泳者，进行短时间潜水来捕食鱼群和其他经过的猎物。

Fund in the cold waters around Antarctica and southern South America, the crocodile icefish feed on krill, copepods, and other fish.

这种鱼是在南极洲以及美洲南部周围的冷水域发现的。

Fund in the cold waters around Antarctica and southern South America, thecrocodile icefish feed on krill, copepods, and other fish.

鳄形银鱼学名"Channichthyidae"，是在南极洲和南美洲南部周围的冷水域发现的，它们主要以磷虾、桡足动物以及其它鱼类为食。

The ivory gull often follows polar bears to feed on the remains of seal kills.

象牙海鸥经常跟在北极熊的后面吃剩下的海豹尸体。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。