Underinsure
保险价值过低
🗣️ 情景例句
I can't eat another bite.
我一口也吃不下去了！
Opportunity only knocks once.
机不可失，时不再来。
If we could actually see the path described by a particle,such as a sand grain in the rock,
假如我们真能看到的运动轨迹，诸如岩石中一个沙粒分子