V-T/V-I When something commences or you commence it, it begins. 使…开始; 开始 [正式]
The academic year commences at the beginning of October.
该学年于10月初开始。
They commenced a systematic search.
他们开始了系统的搜查。
Joan was very much against commencing drug treatment.
琼非常反对开始药物治疗。
I will be on leave during the week commencing 15 February.
我将从2月15日开始一周的休假。
Eventually these were superseded by "small clock", or French, hours, which split the day into two 12-hour periods commencing at midnight.
最终，这些被“小钟”——即法语中说的小时取代了，它把一天分成两个12小时的时间段，从午夜开始。
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