Polyfluocarbon
[化] 多氟烃
🗣️ 情景例句
Last year's tax forms?
譬如去年的纳税申报表格？
He knows best what good is that has endured evil.
忍过痛受过苦，最知幸福是何物。
May I know the quantity you require?
请问你们需要多少数量的货物？