Mendelian gene is not a real physical entity but an abstraction or symbol.孟德尔式的基因并不是真正的实体,而是抽象概念或者是说明性的符号.It is rather disappointing that so few of the features show clear - cut Mendelian pedigree patterns.颇使人感到失望的是,只有很少...
Edgar Hoover, John Lindsay , Richard Nixon and Jack Dempsey.这四个人都在自己的照片上亲笔签了名.I started with Hoover 26 years ago in sales and rose up through the ranks.我26年前加入胡佛公司时做的是销售工作，后来级级攀升。to hoover the carpet用吸尘器清扫地毯Hoover was bu...