In fact, this explanation also answers the question of how the execution of the trait's methods can be deferred until they're used for checking.

实际上，这个解释也回答了为何可以推迟特征方法的执行，直至用该检查的时候。

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In traditional classes, English listening is conducted in a quite fixed mode: explaining new words, listening to the tape, doing written exercises, and then checking of answers.

中学英语听力教学仍然沿用传统僵化的教学模式：教师解释生词，学生听录音，做书面练习，然后教师与学生核对答案。

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They may be drinking and socializing between rounds, but participants at Mr. Kesner's events take the game seriously, and he rarely has to reprimand people for shouting out answers or checking their phones.

WSJ: Trivia Is Pursuit in Bars Across City