Security administration
[计] 安全管理
🧩 词语组成解析
🗣️ 情景例句
Where's your grandson Robbie and his friend Alexandra?
你的孙子Robbie和他的朋友Alexandra呢？
By other's faults, wise men correct their own.
他山之石，可以攻玉。
For the first time in his life, he became the proud owner of a bed which had springs and a mattress.
他平生第一次自豪地拥有了一张既有弹簧又带床垫的床。