Efficiency standards
[经] 效率标准
🧩 词语组成解析
n. 标准；规格（standard的复数）
🗣️ 情景例句
Exploring outer space is a challenge to mankind.
探索外层空间是一项向人类发出的挑战。
He's acomposer of serious music.I like his music a lot.
他是严肃音乐作曲家，我很喜欢他的音乐。
While two detectives were keeping guard at the door, two others opened the parcel.
这时两个侦探把住门口，另外两个侦探打开了包裹。