Iron corrodes unless it is greased or kept clean.如果不涂油或保持清洁铁便会腐蚀.Acid rain destroys trees and corrodes buildings.酸雨毁坏树木，腐蚀建筑物。I do not know why acid corrodes the metal.我不知道酸为什么腐蚀金属....
When it returns to shore, the life-jacket will deflate and revert to a harness.返回岸上后，救生衣就会瘪掉，恢复成背带状。Of course, when the national emergency abates, much of China will revert to its familiar ways.当然了, 随着全国紧急状态消除, 中国的很多方面将回...
Swamp vegetation represent the early stages of a HYDROSERE or HALOSERE.例如湖区边界、河流漫滩或者是干旱地区具有保水粘土的地段.The chloroplasts in the swamp reed were round - shaped with poorly developed grana.芦苇是一种多年生水生草本植物,其典型生境是淡水或含盐的沼泽、河边或湖边.Th...