put a mark的用法和樣例：
例句
- Please don't turn back the corner of the page to mark your place.
請不要在書(shū)頁(yè)上折角做記號。 - You cannot leave it carelessly, you cannot mark it, you cannot turn down the pages, and you cannot use it familiarly.
你不能漫不經(jīng)心地隨手亂放，你不能在書(shū)里做記號，你不能折書(shū)頁(yè)，你不能隨便使用它。
