Information retrieval system
[计] 情报检索系统
🧩 词语组成解析
retrieval
[ri'tri:vəl]
n. 收回，挽回;检索;
🗣️ 情景例句
Rome wasn't built in a day.
冰冻三尺，非一日之寒。
You can never tell.
不知道。
The further off this solid obstruction, the longer time will elapse for the return of the echo.
固体障碍物越远。回声返回所用时间就越长。