Fishes are caught when they are on the way upstream to lay eggs.
鱼群在前往上游产卵的途中被捕获。
In spring, it returns to the fresh water stream to lay eggs.
春天它回到淡水的小溪里产卵。
Each colony may have one or more queens whose job is to lay eggs.
每一个蚁群可能有一只以上的蚁后，这只蚁后的工作就是产卵。
It is very unusual for a mammal to lay eggs or to have poisonous spurs!
对哺乳动物来说，卵生和长有毒刺是很少见的。
Salmon manage to swim upstream to lay their eggs.
三文鱼设法游到上游产卵。
Or maybe she was simply looking for a place to lay her eggs in peace.
也许，她只是想找个地方安安静静地下蛋吧。
This animal scrapes out a hole in the sand to lay its eggs in.
这只动物在沙地上挖了个洞，以便在里面下蛋。
Green and loggerhead turtles return to this sandy beach each year to lay their eggs.
每年，绿海龟和蠵龟都会回到这里的沙滩产卵。
Mammals don't lay eggs. They give birth to live babies.
哺乳动物繁衍后代时不是卵生，而是胎生。
But at night, mother sea turtles go to the beach to lay their eggs.
但是在晚上，海归妈妈会到岸上去产卵。
But at night, mother sea turtles go to the beach to lay their eggs.
但是在晚上，海归妈妈会到岸上去产卵。
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