Previewing
n. 预视；预观察
🗣️ 情景例句
These are polite questions.
这些问题都是礼貌的。
Why does only one sock get lost at a time?
为什么袜子只丢了一只呢？
We have our evening meal at about a quarter past six.
我们6：15分左右吃晚饭。