First of all, it will only be a minute or two at a time, maybe once or twice a lecture.

首先，每次只有一两分钟，一堂课最多不超过两次。

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We would only meet each other once or twice a week.

我们会一周见个一、两次。

The thing is 实战 - SpeakingMax英语口语达人

But our engineers work in a three-star hotel, not very flashy, not on the spotlight, and I only promised them to raise their salaries twice a year.

而我们的工程师在三星级酒店工作，不豪华，更不引人关注，我只承诺每年涨两次薪水。

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If one chord holds twice as long or only half as long, then we have an irregular harmonic change--irregular rate of harmonic change.

如果某一个和弦持续的时间是其他和弦的两倍或者只有一半，这就是不规则的和声改变。

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