The Queen unveiled a plaque to mark the official opening of the hospital.

女王主持揭幕式，标志着医院正式启用。

《牛津词典》

He used a rope to mark off the circle.

他用一根绳子把这个圈围了起来。

《柯林斯英汉双解大词典》

I have several lots of essays to mark this weekend.

这周末我有几批文章要批改。

《牛津词典》

This past week,volunteers from Red Cross and Red Crescent societies around the world gathered in Solferino to mark the anniversary.

VOA: special.2009.07.01

One way to mark time is to imagine it carries a clock as it moves, and put markers every second.

标记时间的一种方法是,想像它带着时钟运动,并且每秒做一次标记

耶鲁公开课 - 基础物理课程节选

The first step is divide them in half. All right? I'm not sure how to mark it here, remember I need to come back there. I'm not yet done. What do I do?

我不能确定如何,在这里进行标记,记住我会回这里进行讲解,我还没做完呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

The solstice is a historically pagan celebration to mark the longest and shortest days of the year.

UNESCO: UK National Commission for UNESCO - Longest crowds for the longest day, as Stonehenge solstice visitors reach 23,000

Any radical regulatory surgery would also require governments to mark out some very artificial boundaries.

ECONOMIST: The contract between society and banks will get stricter

After the unlawful detention ruling last summer, the council apologised to Mark and Steven Neary.

BBC: Hillingdon Council to pay Steven Neary ?35,000