照相机快门速度等级的一种。将快门速度旋钮确定于T门上,按下快门按钮快门打开，开始曝光，而且快门持续打开，直至再次按下按钮时快门关闭即停止曝光。 多用于幽暗的星光、月光和微弱灯光下的拍摄。
t门
原声例句
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Z That was Lit Z, and it did indeed imply every other form of theory, and it was extremely rigorous and interesting, but it wasn't a survey.
这就是文学，那门课极其严格，也非常有趣，但它不是概论。
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One class that I thought was very interesting that doesn't relate with my career so much was a family law class.
其中有一门课叫家庭法，这门课和我的职业关系不太大，但我还是特别感兴趣。
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Now, this is a large class, and if you don't do anything about it, it can be very anonymous.
这是一门大班课程,如果你并不打算和周围人相互介绍的话,也就不会有什么人能够认识你了
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$firstVoiceSent
- 来自原声例句