Pellosil
二氧化硅
🗣️ 情景例句
But I'm sure he has a few bags with him on the train.
不过我相信他在火车上还有几件行李的。
The question hung in the air.
这个问题仍悬而未决。
She's next door.She's in her office, sir.
她在隔壁，在她的办公室里，先生。