这些障碍物对于逆流而上的鱼来说是致命的。
由原始的本能所驱动,大马哈鱼会奋力逆流而上在它们出生的同一个安静的水池内产卵。
Driven by primordial instinct, the salmon hurl themselves upstream to spawn in the same tranquil pools where they themselves were born.
一只太平洋大马哈鱼正在科迪亚克岛的一道小溪中艰难的逆流而上。
A Pacific salmon struggles to swim up a stream on Kodiak Island.
一只太平洋大马哈鱼正在科迪亚克岛的一道小溪中艰难的逆流而上。
A Pacific salmon struggles to swim up a stream on Kodiak Island.
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