Paracresotic acid
[医] 对甲基水杨酸
🧩 词语组成解析
🗣️ 情景例句
I want to take a few days off just for relaxation.
我想请几天假放松放松。
How are you going?Are you going by boat?
你怎样去?坐船去吗？
This depends on the precise radio frequency of the 21-cm wavelength, or 1420 megacycles per second.
这种通讯联系要靠21厘米波段，即每秒1420兆周的精确无线电频率。