The bulk of the book concerns Sandy's two middle-aged children.书中主要描写桑迪的两个已到中年的孩子。His sisters are grown up and his parents are middle-aged.他的姐妹们都已成人，而他的父母亲也人到中年。The guests were mostly middle-aged men talking busines...
汽笛一响, 列车就徐徐开动了.Blowing its whistle, the train moved out, slowly at first.轮船上的汽笛呜呜叫.The ship's whistle kept hooting.汽笛在叫.The steam whistle is blowing....
I agree with the theorem that the best defence is offence.我同意最好的防御是进攻的理论.His theorem can be translated into simple terms.他的定理可用更简单的术语来解释.By the corollary to Theorem 4.3, the origin is asymptotically stable.根据定理4.3的推论, 原点...
吉米瘫倒在地板上，像匹受伤的赛马一样拼命踢蹬着双腿。Jimmy collapsed on the floor, thrashing his legs about like an injured racehorse.踢踏舞演员在舞台上踢蹬出不同的节奏.The tap dancers produced different rhythms on the stage.估计今天是踢蹬不完这些活了, 明天再接着干吧.I guess the job ...