Step piston
[化] 级差活塞; 阶梯形活塞
🧩 词语组成解析
step
[stɛp]
n. 步，脚步;步骤，手段;步调;级别;
vt.& vi. 举步，行走;踩，踏上;跨入;轻快地走;
vi. 踏，踩;走;
vt. 跳舞;迈步;使成阶梯状;
piston
['pɪstən]
n. <机>活塞;
🗣️ 情景例句
You're really stretching the truth.
你太言过其实了。
The rage of a wild boar is able to spoil more than one wood.
野猪一怒毁树多。
The boy was too nervous to speak.
那男孩紧张得说不出话来。