自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
N-COUNT 点;小点;小圆点 A dot is a very small round mark, for example one that is used as the top part of the letter 'i', as a full stop, or as a decimal point.
N-COUNT (因距离远而看起来)似小点之物，点状物 You can refer to something that you can see in the distance and that looks like a small round mark as a dot .
Soon they were only dots above the hard line of the horizon.
VERB 散布于;星罗棋布于;遍布 When things dot a place or an area, they are scattered or spread all over it.
Small coastal towns dot the landscape.
PHRASE 准时地;按指定时间 If you arrive somewhere or do something on the dot, you arrive there or do it at exactly the time that you were supposed to.
They appeared on the dot of 9.50 pm as always...
At nine o' clock on the dot, they have breakfast.
他们在 9 点钟准时吃早饭。
PHRASE (在耗时且无关紧要的事情上)一丝不苟，注重细节 If you say that someone dots the i's and crosses the t's, you mean that they pay great attention to every small detail in a task; often used to express your annoyance because such detailed work seems unnecessary and takes a very long time.
PHRASE 很久以前 The year dot is used to mean a very long time ago.
You've wanted to be a barrister since the year dot.