Plis
abbr. propellant-level indicating system 推进剂水平指示系统
🗣️ 情景例句
Yes, sir.
是的 ，先生。
If one sheep leap o'er the dyke,all the rest will follow.
一羊跳过沟，众羊跟着跳。
that a series of deep soundings was obtained in the Atlantic and the first samples were collected by dredging the bottom.
才在大西洋测得一个个海水深度，同时通过挖掘海底，取得了研究海底的首批样品。