John Stevenson is Reader in History at the University of Sheffield.约翰·史蒂文森是谢菲尔德大学的历史学高级讲师。Stevenson's deeply felt performance is a tour-de-force.史蒂文森感人肺腑的表演真是绝了。We elected Mr. Stevenson to head the team.我们选举了斯蒂文森先生率...
leucyl leucine亮氨酰亮氨酸Cottonseed meal is deficient in lysine, methionine and leucine.?澍宸廴狈?蛋彼幔0蛋氨酸和亮氨酸.In plant cells the principal precursor of alanine , as well as leucine and valine, is pyruvate.植树细胞中丙氨酸和亮氨酸 、 缬氨酸的主要前体是...