Qos
abbr. Quality of Service 服务质量
🗣️ 情景例句
First word ...
第一个字……
An old dog barks not in vain.
老犬不空吠。
Ann began to put the candles on her cake. Then she counted them.
安开始把蜡烛插到她的生日蛋糕上。插完，她数了数。