...however,sea otters feed on the urchins and can prevent them

地点状语：Off the coast of western North America, 在北美西部的海面上 插入语：however, 但是，然而 句子主体：sea otters feed on the urchins and can prevent them from becoming too abundant, 海獭以海胆为食，以免它们（海胆）变得太丰富，状语：thereby keeping the kelp forests intact 从而保...

sea otters also have to keep on eating. The food they eat in a single day can weight as much as 30% of their body weight. Shellfish, urchins and sleeve-fish are their favorites. And, it’s not improper to call them the genius in the sea, because among all marine animals...

在海胆，水懒，和海草之间的生态平衡，到了19世纪变的不平衡了。

on the body, allowing the seal to escape and survive the attacks with their scars as witness. Large white sharks will also scavenge on the carcasses of whale sharks, and on the fat-rich blubber layer of dead whales. They will occasionally feed on sea turtles and sea otters,...

地点:挪威和英国之间的北海 Location: North Sea between Norway and the UK 漏油量:26.3万吨 Amount of oil: 263,000 tons 对环境的影响: Impact on the environment: 井喷事故并没有破坏钻井平台,这起原油泄漏事故没有造成重大生态灾难。 Blowout and did not damage drilling platforms, which from the oil ...

2.allow的第一个宾语sea urchi populations后面带了个由“介词on +关系代词which"引导的定语从句。之所以选择介词on，是因为定语从句中的谓语动词prey（不及物动词）搭配的需要，prey+on构成词组，表达“捕食”的意思。3.另外，句中and这个并列连词后省略了与第一分句完全相同的结构“Fewer otters would ...

不过实际上就是这样。由于海星的活动不能像鲨鱼那般灵活、迅猛，故尔，它的主要捕食对象是一些行动较迟缓的海洋动物，如贝类、海胆、螃蟹和海葵等。它捕食时常采取缓慢迂 徊的策略，慢慢接近猎物，用腕上的管足捉住猎物并将整个身体 包住它，将胃袋从口中吐出、利用消化酶让猎获物在其体外溶解 并被...

We soon found the tombstone of grandma and grandpa, put the pre prepared supplies, put up tea and wine, lit the fire, and the tomb sweeping ceremony began. First, the adults bring the paper money, the paper TV, watch, clothes, radio and so on, and burn them to grandma ...