Since there is such an abundance of food in the sea, it is understandable that some of the efficient, highly adaptable, warm-blooded mammals that evolved on land should have returned to the sea.
既然海洋中有如此丰富的食物，一些原本在陆地生存的高效率的，适应性强的暖血型动物返回海洋生存是不难理解的。
What kind of sea food do you have?
你们有什么海鲜？
They lived near the sea and they relied on fish as a main source of food, that is, a food that came to them, so they didn't have to move around as land-roaming hunter-gatherers did.
他们当时居住在海边，所以主要就以捕鱼为生，所以就没必要像世界其他地区的陆地狩猪采集者一样到处奔波迁徙。
Since there is such an abundance of food in the sea it is understandable that some of the efficient highly adaptable warm-blooded mammals that evolved on land should have returned to the sea.
既然海洋中有如此丰富的食物，一些原本在陆地生存的高效率的、适应性强的暖血型动物返回海洋生存是不难理解的。
The scientists say that as more sea ice melts, polar bears have to swim greater distances in search of food.
科学家表示，由于越来越多的冰层融化，北极熊必须游更远的距离来寻找食物。
Since there is such an abundance of food in the sea, it is understandable that some of the efficient, highly adaptable, warm-blooded mammals that evolved on land should have returned to the sea.
海洋哺乳动物既然海洋中有如此丰富的食物，一些原本在陆地生存的高效率的，适应性强的暖血型动物返回海洋生存是不难理解的。
Ninety percent of the World Food Programme's shipments arrive by sea, and ships have required a military escort.
天下食粮筹划署百分之九十的输送食粮的海上船只要求戎行护送。
The Yellow River and the Yellow Sea in Shandong is an abundant resource of food supplies. The bright working people have created rich and colorful diet, including Jinan and Jiaodong local flavor.
黄河、黄海为山东菜提供丰富的物资，聪明的劳动人民创造了丰富多彩的菜肴美点，并有了济南和胶东两种地方风味美食。
The Yellow River and the Yellow Sea in Shandong is an abundant resource of food supplies. The bright working people have created rich and colorful diet, including Jinan and Jiaodong local flavor.
黄河、黄海为山东菜提供丰富的物资，聪明的劳动人民创造了丰富多彩的菜肴美点，并有了济南和胶东两种地方风味美食。
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