By one's side表示“在某人身边,在某人附近”,例如:She was always by her father's side when he was ill.(她父亲生病时她总是不离左右。)此外,和side相关的词组还有很多,比如:on the side(除主要部分外,兼职),例:did some consulting work on the side(做些咨询工作...