Salmon manage to swim upstream to lay their eggs.
三文鱼设法游到上游产卵。
The barriers are lethal to fish trying to swim upstream.
这些障碍物对于逆流而上的鱼来说是致命的。
It means to swim upstream because the stream is flowing into the foul pit of destruction.
它意味着要逆流游泳，因为河水正在流入到毁灭的污水坑中。
So, salmon swim upstream to get to their spawning grounds, and lancet flukes commandeer a passing ant, crawl into its brain, and drive it up a blade of grass like an all-terrain vehicle.
鲑鱼会游到河的上游去找寻产卵的地方。而枝双腔吸虫则会钻到蚂蚁的大脑里，操控蚂蚁的大脑，驱赶着蚂蚁爬到草尖上。
It's been known to swim hundreds of miles upstream in rivers like the Mississippi and can be found in fresh water many miles from the ocean.
牛鲨曾经沿如密西西比河逆流而上数百里，也可以在远离大海的淡水区域发现它们的踪迹。
It was too dark to swim in the waterhole upstream.
可惜天黑了，不能去河上游的深水洼游泳。
On Saturday at the base of the dam, officials counted only 72 salmon, unable to swim any farther upstream.
星期六在大坝的地基处，官员们数出只有72条三文鱼，他们不能进一步逆流往上游。
From upstream to downstream, to go to, have no a propeller, without losing tracing the swim fins, ability, we can not return in the past.
从上游来，往下游去，没有桨，没有鳍，失去溯游的能力，我们回不到从前。
From upstream to downstream, to go to, have no a propeller, without losing tracing the swim fins, ability, we can not return in the past.
从上游来，往下游去，没有桨，没有鳍，失去溯游的能力，我们回不到从前。
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