Husband and wife should switch roles occasionally.

夫妻间应该偶尔对调充当的角色.

They agreed to switch roles for once and be the interviewees rather than interviewers.

他们同意变换一下角色,做一次被采访者,而不是采访者.

She explained that she written a narrator's part to the play, and asked me to switch roles.

她解释说她已经为此剧写了旁白的部份，并且要我调换角色。

Then, a few weeks later, the two lizards switch roles and repeat this process so that the second female will be able to ovulate and lay her eggs.

然后过几个星期，两只蜥蜴再交换角色，重复这种交配仪式，这样另一只雌蜥蜴就可以排卵，产卵了。

Gallas insists he is happy to play in any position that is not normally regarded as his speciality but finds it difficult to switch roles during a game.

加拉斯认为很乐意踢任何位置，但不能把他认为这是他的专业，他觉得在一场比赛中变化角色很困难。