汉译英玛丽主修化学/由于下大雪,我们无法开车去北京/他们是何时建完这所学校的

Mary majors in Chemistry.
We can't drive to Beijing due to the heavy snow.
When did they finish building the school?

不是很有文采~~

Mary majoring in chemistry
Because under the snow, we are unable to drive to Beijing
When did they finished building this school