Underhammer
下置式击鎚
🗣️ 情景例句
I kept out of their quarrel.
我不介入他们的争吵。
Science is organized knowledge.
科学是系统化的知识。
The basic features include a crest (the highest point of the wave),
它们的基本特征包括浪峰（波浪的最高点）