Trifluoride
三氟化物
🗣️ 情景例句
Well, make yourselves comfortable.
噢， 请大家自便。
Let me see. That would be $40.00 a day plus 38 cents a mile.
让我瞧瞧。一天40美元，每英里外加3角8分。
He hired a workman to repair the fence.
他雇用了一个工人修理围墙。