他们实际上在观测鱼向上游的迁移活动。

They actually monitor the movement of the fish going up river.

《柯林斯英汉双解大词典》

鲑鱼正在向上游洄游。

The salmon are running upstream.

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鱼群为产卵而疯狂地向上游挤进。

The fish were madly pushing their way upstream to spawn.

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这艘船顺尼罗河向上游航行。

The ship is sailing up the Nile.

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我们把小船向上游划去。

We rowed the boat up the stream.

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鲑鱼正在向上游洄游。

The salmons are running upstream.

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这一过程不断继续的同时，瀑布亦向上游移动。

This one process is ceaseless continual at the same time, chute also upstream is mobile.

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我们的船向上游驶去。

Our ship is steering towards the upriver.

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从海洋向上游到河流中，并在淡水中产卵的。用于指鱼。

Migrating up rivers from the sea to breed in fresh water. Used of fish.

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因为当黑线鳕鱼看到一个网，它们会向上游逃跑但是却被捕捉。

Because when haddock face a net, they swim up to escape and get caught.

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因为当黑线鳕鱼看到一个网，它们会向上游逃跑但是却被捕捉。

Because when haddock face a net, they swim up to escape and get caught.

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