at a time, at one time
at a time, at one time take time 意为"花费时间", take one’s time 意为"慢慢来,别着急",相当于 “don’t hurry”。 例如: A great talent takes time to mature. 大器晚成。 Take your time, we still have 20 minutes left. 别着急,我们还有20分钟的时间呢。 at a time 意为"每次;一次"。 at one time 意为"同时;曾经一度",常用于过去时。 at the time 意为"在那时;在那段时间"。常用于过去时态。 例如: Take two pills at a time. 一次服两粒。 At one time they were friends, but they are seldom together now. 他们曾经是朋友,但是现在很少在一起了。 He agreed at the time but later changed his mind. 他当时同意了,但后来又改变了主意。 ...