Tetrasilane
四硅烷, 丁硅烷
🗣️ 情景例句
What's the problem?
什么问题啦？
First, I would like to express to all of you here our sincere welcome.
首先，我向在坐的诸位表示诚挚的欢迎。
She got up before 7 o'clock in the morning, and quickly washed her hands and face.
00以前起床，快快地洗手洗脸。