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.(專家說，對一些口吃者來說，跟嬰兒或動物說話，模仿外國口音，或者上臺表演時，口吃會消失。)

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讓她們在華盛頓登臺，哪怕演出被認為是自愿的，具體到個別火箭女郎，可能也會感覺自己不得不參加演出。)

Besides training, soldiers can enjoy movies and perform onstage in speaking contests.(在訓練之余，士兵們還可以看電影，參加演講比賽上臺表演。)