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1·These dams blocked access to upstream spawning beds for six species of salmon on what once was one of the most productive salmon rivers in the world.

这些水坝阻断了6种鲑鱼的上游产卵地，而这条河曾是世界上鲑鱼产量最高的河流之一。

2·Built nearly a century ago to provide power to lumber and paper mills in the town of Port Angeles, these dams blocked access to upstream spawning beds for six species of salmon.

这些大坝建于近一个世纪以前，是为洛杉矶港的木材和造纸厂提供电力的，大坝阻断了6种鲑鱼的上游产卵地。

3·The lumber and paper mills in Port Angeles also block access to upstream spawning beds.

安吉利斯港的木材和造纸厂也封锁了通往上游产卵场的通道。

4·One hypothesis is that it's a natural phenomenon, that the starfish naturally undergo population fluctuations following particularly good spawning years.

有一种假说认为，这是一种自然现象；在特别适合产卵的那几年后，刺冠海星自然会经历种群数量的波动。

5·After spawning, most die of exhaustion.

繁衍过后，多数鲑鱼会因精疲力竭而死。

6·Oil Spill Would Threaten Mangroves, Spawning Fish

石油泄漏会威胁到红树林和产卵的鱼类

7·Figures 1-4 detail the spawning, uh, process.

图1 - 4详细说明了进程的产生过程。

8·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。

9·Spawning Runnable tasks to find more URIs on a site's pages.

生成Runnable任务，在网站的页面上找到更多的URI。

10·They provide spawning grounds and nutrients for fish and shellfish.

它们为鱼类和贝类提供产卵场所和营养物。

(1)spawning ground发祥地；产卵场所；酝酿或发展之处