The roofs covering a portion of the building perform a role that is both symbolic and environmental.

屋顶只覆盖了建筑的一部分，起着象征和环保的作用。

youdao

And experts say that for some people, stuttering disappears when they speak to infants or animals, imitate a foreign dialect, or perform a role onstage.

专家说，对一些口吃者来说，跟婴儿或动物说话，模仿外国口音，或者上台表演时，口吃会消失。

youdao

Its merits in combat remain to be seen, but at least the ship exists to perform a combat role.

它在战场上的优点仍有待观察，但至少它的存在是要在战斗中履行一份任务的。

youdao

Nina struggles to perform the leading role in "Swan Lake" while dealing with a controlling mother, played by Barbara Hershey.

VOA: special.2011.02.21

The Queen will arrive later this morning to perform a role she has performed so many times before.

BBC: 'Evans the News' claims support of MPs after arrest

In a country not tied together by the glues of ethnicity or religion, they perform a unifying role.

ECONOMIST: John Rocker, under fire

But it turns out that they perform a second role, which drug companies have paid scant attention to until recently: flagging the immune system to kill cancer.

FORBES: Magazine Article