Tetrasulfide
四硫化物
🗣️ 情景例句
What did you order?
您点了什么？
One sows another reaps.
不劳而获。
He described it as 'a very agreeable situation located within two small hills in the midst of which flowed a great river.
“地理位置十分适宜，位于两座小山的中间，一条大河从中间流过”。