Biocalc
氢氧化钙
🗣️ 情景例句
Sure. Would you please sign your name on the back, sir, with your passport number?
每问题。先生，请您在支票背后签上名字和护照号码。
Do you often do work during the holidays?
你常常在假日期间做工作吗？
'Oh dear,' said the conductor suddenly.
“哎呀，”售票员突然说，