1、compel

强迫;逼迫

the introduction of legislation to compel cyclists to wear a helmet.

强制骑自行车者戴头盔的法律的出台

Leonie's mother was compelled to take in washing to help support her family.

利奥妮的妈妈被迫在家替人洗衣服，以贴补家用。

觉得必须(做…)

Dickens felt compelled to return to the stage for a final good-bye.

迪肯斯觉得必须返回舞台作最后的道别。

I felt morally compelled to help.

我觉得从道义上我必须帮忙。

2、serious

严重的;危急的;令人担忧的

Crime is an increasingly serious problem in Russian society.

犯罪猖獗是俄罗斯社会面临的一个日益严重的问题。

The government still face very serious difficulties.

政府仍然面临着非常严峻的困难。

认真的;郑重的;严肃的

My parents never really faced up to my drug use in any serious way.

我父母从未认真地正视过我的吸毒问题。

It was a question which deserved serious consideration.

这是一个值得认真考虑的问题。

重要的;需要认真考虑的

I regard this as a serious matter.

我认为这件事很重要。

Don't laugh boy. This is serious.

小伙子，别笑，这很严肃。