在一个计算属性里可以完成各种复杂的逻辑,包括运算、函数调用等,只要最终返回一个结果就可以,计算属性中,分别包含了一个____和____,指代了计算属性的设置和读取操作。
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As soon as I stepped(A) out of(B)the room, I had found(C) a bus rushing by.(D)
Things(A) are getting(B) better and better when(C) time goes on(D).
Joan sang(A) while(B) she walked along(C), with(D) a book in her left hand.
Jack was washing(A) dishes(B) then(C) Mary knocked at(D) the door and entered.