The growth rate of fish was higher during 1-2 and 21-30 d after hatch, but slower during 5-9 and 31-40 d after hatch.

仔、稚、幼鱼的生长速度具有明显的阶段性，1～2日龄仔鱼生长较快，5～9日龄生长减慢，21～30日龄生长加快，31～40日龄生长减慢。

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Now we know that, shortly after they hatch, ducklings fix on any object about the size of a duck and will henceforth follow it.

现在我们知道，小鸭子孵化后不久，它们就会固定在如鸭子大小的任何物体上，并从此跟随它。

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She doesn't even have time to feed herself—so she often ends up dying shortly after her eggs hatch.

她甚至没有时间进食——所以她经常在她的蛋孵化后不久死去。

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After Hatch was quoted Sunday in The Salt Lake Tribune saying immigration reform couldn't wait, a message went out to call his office with thanks.

WSJ: Immigration debate gives life to annual rallies

Christa Mateman, at the Netherlands Institute of Ecology, in Heteren, and Jan Komdeur, at the University of Groningen, and their colleagues, have discovered that young female Seychelles warblers sometimes help at their parents' nest for a year or two after they hatch.

ECONOMIST: Sexy sons, dutiful daughters | The

These eggs can be modified with a large number of special items that drop for the event, and allow players to custom build a special courier that will hatch after the event ends.

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