Simu
abbr. stellar inertial measuring unit 天体惯性测量设备
🗣️ 情景例句
Keep quiet about it if you know what's good for you.
什么也别说，免得你自个儿添不自在。
There is a crook(=affliction,trial) in the lot of every one.
人生总有倒楣事；人生总有不如意处。
Good.we can't extend the deadline.
那好，我们可不能延期的。