Difluorene
[化] 联芴
🗣️ 情景例句
Eight o'clock.
八点钟。
Excuse me to have kept you waiting.
对不起让你就等了。
it would be more like that of a bluebottle buzzing round the room;
那就像一只嗡嗡叫的绿头苍蝇在屋内飞行的轨迹，