n.标点器(点标器；加点的东西)
The train arrived on the dot of three o'clock. 那辆火车三点钟准时到达。
He said he used this system in the year dot. 他说他很久以前用过这个系统。
He went away, limping dot and go one. 他一拐一拐地跛着走开了。
He's very punctual always arrives on the dot. 他很守时--总是按时到。
She was told to arrive at 8 o'clock on the dot. 她被告知八点钟准时到。
He watched the train away until it was only a dot in the distance. 他目送着列车驶去，直到它成了远方的一个小黑点。
