Involves
v. 包含；牵涉（involve的第三人称单数形式）
🗣️ 情景例句
Where did you go to school?
你在哪儿上学？
Discretion is the better part of valour.
小心即大勇。
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。