When you swim up stream, you have to stem the current.

当你往上游游的时候, 你得顶着水流而上.

辞典例句

It'sometimes made him glad when he noticed how the fishes kept their heads up stream.

有时当他看到鱼儿向河上游游来时心中就感到高兴.

名作英译部分

When you swim up - stream you have to stem the current.

你向上游游泳时,必须逆流而行.

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The bird flapped its up stream.

那鸟鼓翅向河上游飞去.

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