He put his ear close to the ring, turned a gear-wheel a notch and heard the faint, ominous click.
他把他的耳朵贴近戒指，打开齿轮的切口听到了微弱的不详的滴答声。
A2: Make another notch on the steering wheel.
答2：在方向盘上再做一个标记。
The framework calls this member function as a user rotates the mouse wheel and encounters the wheel's next notch.
当用户滚动鼠标滚轮并遇到滚轮的下一个刻度时，框架就调用这个成员函数。
The framework calls this member function as a user rotates the mouse wheel and encounters the wheel's next notch.
当用户滚动鼠标滚轮并遇到滚轮的下一个刻度时，框架就调用这个成员函数。
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