Sigs
abbr. simplified inertial guidance system 简易惯性制导系统; stellar inertial guidance system 天体惯性制导系统
🗣️ 情景例句
and he's very unhappy about not working.
他对没有工作感到怏怏不乐。
He has not come in yet.
他还没有来。
You'll have to wear this hard hat for the tour.
参观时必需戴上这安全帽。