1
arrive/be + on the dot
The train arrived on the dot.
火车准时到达。
准时地；正好在指定的点上
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准时地；正好在指定的点上
exactly at the appointed time; precisely at the indicated point
The train arrived on the dot.
火车准时到达。
The meeting started at 9 AM on the dot.
会议在上午9点准时开始。
Her train arrived at 8:47 on the dot.
她乘坐的火车在8点47分准时到达。
He submitted the report at midnight on the dot.
他在午夜时分准时提交了报告。
The train arrived on the dot.
火车准时到达。
强调整点时刻。
He showed up at 5:00 on the dot.
他正好五点出现。
指空间上的精确位置。
The mark is exactly on the dot.
标记正好在点上。
Not this
He arrived on dot.
Use this
He arrived on the dot.
短语 'on the dot' 中的定冠词 'the' 不能省略，表示 '准时地'。
Not this
She finished at the dot.
Use this
She finished on the dot.
表示'准时地'应使用介词 'on' 而非 'at'，因为 'on the dot' 是固定搭配。
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Dictionary facts from ECDICT.