关税：tariffs

Tariffs on imported goods

征税：levy/impose tax

The government levies taxes on fast-food chains

生效：Takeeffect

可以表示法律法规等开始实施

The new schedule will take effect from the beginning of May.

也可以表达药物，措施等开始生效

The pills/measures start to take effect.

疏远：drive/tear/push people (further) apart

People are wondering whether technology is bringing us together ordriving us apart.

主动疏远某人或是某事可以用distance oneself from sb/sth

Struggling in school can impact teens in a variety of ways and maycause them to withdraw from previously enjoyed activities anddistance themselves from friends.

公平竞争的环境：level playing field

The new legislation is intended to create a level playing field forstudents of all backgrounds.

Trade between the world’s two largest economies has slumped,and China, which had long been America’s biggest trading partner,dropped to third place in the first half of the year.

 American imports from China fell by 12 percent in the firsthalf of the year, while exports to China dropped 19 percent.

烟消云散，归于平静：blow over

I think the tension between mom and grandma will blow over.

争先恐后：scramble to do/ for

More than three million fans are expected to scramble for tickets抢购门票

造成问题或麻烦的原因,罪魁祸首:culprit

Lack of exercise is also a major culprit in the obesity epidemic.