B-unit
变数部件，变址部件
🧩 词语组成解析
unit
['ju:nit]
n. 单位，单元;装置;个体;[数]单位数;
🗣️ 情景例句
Our troop was under his command.
我们的部队由他指挥。
The target shooting requires the power of concentration.
射击需要集中精神。
Yes, I can. Where are they?
是的，我能听到。它们在哪儿？