Subfluoride
低氟化物, 氟化低价物
🗣️ 情景例句
One day, you'll have your own family,
总有一天，你会有你自己的家，
Compare your grievs with other men's and they will seem less.
你的悲痛与人比，悲痛就会轻一些。
'You needn't have said that,' my wife answered.
“你没必要这么说，”我妻子回答说，