Rav
abbr. 瑞星杀毒软件；右心房容积（Right Atrial Volume）
🗣️ 情景例句
That's nothing at all.
不用客气。
I've spoken English all my life.
我一辈子说英语。
'Do you always get up so late? It's one o'clock!'
“你总是起得这么晚吗？现在已经1点钟了！”