dots
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 in the addresses of websites.
a system of painting using small dots of colour.
一套运用小色点作画的方法。
on the dot
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 p.m. as always.
他们同往常一样在晚上9点50分准时出现了。
dots , dotting , dotted
When things dot a place or an area, they are scattered or spread all over it.
Small coastal towns dot the landscape.
海滨小镇到处都是。