Difluoride
二氟化物
🗣️ 情景例句
Here are the samples for your examination.
这里是样品，请查看。
The husband mows his lawn on Saturdays.
那位丈夫在每个周六修剪草坪。
'It doesn't matter,' I said.'I'll get off here.'
“没关系，”我说，“我就在这儿下吧。”