To start a game you can either hit a or double tap the game.

按下A键或者双击游戏都能开始一个游戏。

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Tap the double arrows next to the subject field.

请点击“主题”字段旁的双箭头。

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Double safety unit prevents screw tap from wearing out.

二重安全离合器装置能防止丝攻之折损。

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Double safety unit prevents screw tap from wearing out.

二重安全离合器装置能防止丝攻之折损。

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