He was unsmiling and silent.他不苟言笑，沉默寡言。His eyes were hard and unsmiling.他目光严厉冷峻。She submitted to this scrutiny in unsmiling silence, patiently waiting for his next move.让他这么看着,刘玉英也不笑,也不说话, 耐烦地等待那结果....
Both of his winning times were world bests.他的成绩均为世界最好成绩.He bests me in the mathematics.他在数学方面超过我.All three of these performances were new personal bests for these two athletes.所有这三场比赛的表现是这两名运动员的最佳个人成绩....
The artificial sweetener sorbitol has a laxative effect.人工甜味剂山梨糖醇有通便作用。Molasses are mildly laxative and something of a general tonic.糖蜜有些许通便作用，兼具强身功能。If you're constipated you may need a laxative.便秘时可服用泻剂....