A main objective is to protect spawning and young fish .

一个主要目的是保护产卵的鱼和幼鱼。

Spawning at kurile lake begins in july and lasts till march .

每年七月至次年三月，红大马哈鱼会在库页湖中产卵。

They are preparing for their annual spawning .

它们正准备一年一度的产卵。

It will free up some 70 miles of salmon habitat and allow the fish to reach their upstream spawning grounds again .

这项工程将使约70英里内栖息与此的鲑鱼得以再次自由地游向上游的产卵地。

Birds are singing , frogs spawning , flowers coming into bloom - and that is just the start .

鸟儿在唱歌，青蛙在产卵，花儿正在尽情地开放-这仅仅是个开始。