Paraffin waxes are normally marketed on the basis of a melting - point test.石腊一般按其熔点不同在市场上分类出售.She waxes righteously indignant if anyone tries to contradict her.如果有人想反驳她,她说起话来就会义愤填膺.The moon waxes till it becomes full, a...
A powerful electric current is passed through a piece of graphite.给一块石墨通入强电流。Electric current is often powerful enough to kill a man.电流常强得足以致命.This engine puts out more electric current than the other one.这台发电机比另一台发的电多....