B acid
[机] B酸
🧩 词语组成解析
🗣️ 情景例句
Please excuse me. I'm very sorry.
请原谅我， 我真的很不好意思。
I think it's about time we got going.
我想差不多是该告辞的时候了。
who produced it with a flourish and pointed out a microscopic 'o' beside the time of the arrival of the train at his station;
站长拿着时刻表一挥手，指着那趟列车到站时刻旁边一个很小的圆圈标记。