Orthosilicate
正硅酸盐
🗣️ 情景例句
I heard that some tours actually go down into the canyon. Is that true?
我听说有的旅游团真正下到峡谷里去了。那是真的吗？
Nerd.
书呆子。
'Do you always catch such an early train?' asked the inspector.
“您总是赶这样早的火车？”探长问。