As she stood there, one of the soldiers who acted as pallbearer came up to her. 当她站在那里，一个士兵谁担任棺来到她跟前。
The teacher was the last one to bless the coffin.As she stood there, one of the soldiers who acted as pallbearer came up to her."Were you Mark's math teacher? 老师最后一个向他致意，当她站立在灵柩前时,一位护灵者走上前来，“你是马克的数学老师吗?
The forest will act as a defense against desert dust. 森林能起防御沙漠灰沙的作用。
We must appoint sb to act as secretary. 我们得指定一个人当秘书。
He was appointed to act as the executor. 他被指定为遗嘱执行人。
Maybe I can act as a messenger for you. 也许我能给你当信差。