The knee is the joints where the thight bone meets the large bone of the lower leg.
膝盖就是大腿骨和小腿大骨头的连接处
Acids are chemical compounds that,in water solution,have a sharp taste,a corrosive action on metals,and the ability to turn certain blue vegetable dyes red.
酸性物质是这样的一种化学物质，它能够溶于水，有强烈的味道，对金属有腐蚀性，并且能够使某些蓝色的植物性染料变红色。
Billie Holiday\'s ruputation as a great jazz-blues singer rests on her ability to give emotional depth on her songs.
比利之所以被认为是一个伟大的蓝调爵士乐歌手，是因为她能够让她的歌声充满深情。
