unit 4  astronomy：the science of the stars 第4单元 行星的科学（重点短语）

1. in time意为“及时”时相当于early enough, soon enough;意为“终于，早晚”时相当于sooner or later。

we got to the station just in time to catch the bus.=we got to the station just in time for the bus. 我们到达车站时，刚好赶上了那班汽车。

the doctor came in time to save her life. 医生及时赶来救了她的命。

youll succeed in time if you keep on working hard. 假若坚持努力下去，你迟早会成功的。

be in time for sth./be in time to do sth. 对于某事是及时的/及时做某事

ahead of time 提前；提早

all the time 一直；始终

at one time曾经；一度

at a time 一次

at times 有时

at the same time 同时；然而；可是