Bbr
abbr. 黑体辐射器（Black Body Radiator）
🗣️ 情景例句
It's time we hired a secretary to answer the phones.
我们早就该请一个秘书接听电话了。
My parents got married in 1
我父母1954年结婚的。
The letter x stands for an unknown number.
字母x代表未知数。