15秒记一个单词第2107个（15秒记一个单词第216个）

Make sure that you are working in a comfortable position.

工作时一定要保持舒适的姿势。

英语解释：

the way in which sb is sitting or standing, or the way in which sth is arranged (坐、立的)姿态,姿势；放置方式

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