Mcdv
[医]玉米褪绿矮缩病毒
🗣️ 情景例句
Say good-bye to Richard.
替我向Richard说声再见。
Don't fly till you wings are feathered.
羽毛未丰不要飞。
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，