Fluoroplastics
氟塑料
🗣️ 情景例句
It is.
正是。
Her parents don't approve of me and want her to forget me.
她的父母不赞成我们，想要她忘记我。
Up to now, historians have assumed that calendars came into being with the advent of agriculture, for then man was faced with a real need to understand something about the seasons.
历史学家迄今认为日历是随农业的问世而出现的，因为当时人们面临着了解四季的实际需要，