1、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。)
2、So even if an appearance is considered voluntary, individual Rockettes may feel forced to perform if they are told that executives want them onstage in Washington.(所以如果被告知高管想让她们在华盛顿登台，哪怕演出被认为是自愿的，具体到个别火箭女郎，可能也会感觉自己不得不参加演出。)
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3、Besides training, soldiers can enjoy movies andperform onstage in speaking contests.(在训练之余，士兵们还可以看电影，参加演讲比赛上台表演。)