Some backtracking is probably inevitable.有时改变决定可能是不可避免的。Leonard jumped in his car and started backtracking.伦纳德跳进车里，开始原路折返。The backtracking mechanism is an important facility for programming in logic.回溯机制是逻辑程序设计的重要设施....
身材瘦削而且训练艰苦的女运动员行经可能不那么频繁，或者根本不来月经。Lean hard-training women athletes may men-struate less frequently or not at all.妇女的平均月经周期是28天。The average length of a woman's menstrual cycle is 28 days.她于13岁开始有正常的月经,周期为28～32天,有轻度的...
She often went to parties and dances at Littlecote.她经常去利特尔科特参加聚会和舞会。Hardy as a young man played the fiddle at local dances.哈迪年轻时在当地舞会上演奏小提琴。Jerry is an amateur who dances because he feels like it.杰里是个业余跳舞爱好者，他跳舞是因为自己喜欢。...
Don't be too downhearted. There's always a way.别太悲观了，总有办法的。Max sighed, sounding even more downhearted.马克斯叹了口气，听上去更沮丧了。We're disappointed by these results but we're not downhearted.我们对结果感到失望，但是并未丧失信心。T...
a conglomeration of buildings of different sizes and styles大小和风格各异的建筑楼群To her it was a wonderful conglomeration of everything great and mighty.在她看来,那里奇妙地聚集着所有伟大和非凡的事业.C, improve stock sharing structure, absorb several sh...