Sionox
二氧化硅
??? 情景例句
I've been trying to find
我一直在尋求
It's a shame this machine is so slow.
真遺憾，這臺機器太慢了。
He called out to the children and threw the ball back to the bank.
他大聲叫著那些孩子，把球扔回到岸上。