Many a famous pop star has been ruined by drugs.很多著名的流行音乐歌星都因使用毒品而毁了自己....a guided tour of a ruined Scottish castle.由导游带领游览苏格兰荒废城堡It's completely ruined, so we'll have to start from scratch.它完全毁了, 我们只好从头做起.Much...
添加的甲基汞的回收率据报到达90%左右.The recovery of added methylmercury was reported to be approximately 90 %.通过相同的和添加的作用, 多基因可以对总的变异起重大的影响.Through similar and supplementary action, polygenes can have important effects on total variabil...