Mice that lacked the estrogen receptor showed poor ability to locate a platform hidden in a small swimming tank over a training period of several days.
研究者在一段时间内训练小鼠找出一个隐藏到微型游泳槽内的平板，缺乏雌激素受体的小鼠的学习能力很差。
You can imagine a polar bear in the desert with a swimming pool 50cm deep. It's difficult to watch this poor animal suffering and in pain.
你可以想象得出，一只生活在沙漠中的北极熊只有一个50厘米深的游泳池，它这么受苦，我真的看不下去了。
And there is a swimming poor next to the garden. In the summer, we can swim in it.
在花园旁边有一个用游泳池，夏天我们可以再里面游泳。
We have a swimming poor in the back yard.
我们在后院有个游泳池。
The duck was excellent in swimming, in fact better than his instructor, but he made only passing grades in flying and was very poor in running.
鸭子是极棒的游泳能手，事实上，比他的教师更专业，但是，他在飞行上经过艰苦的训练，仅仅能通过级别考试，而在赛跑方面更是惭愧至极。
The duck was excellent in swimming, in fact better than his instructor, but he made only passing grades in flying and was very poor in running.
鸭子是极棒的游泳能手，事实上，比他的教师更专业，但是，他在飞行上经过艰苦的训练，仅仅能通过级别考试，而在赛跑方面更是惭愧至极。
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