Infocus
n. 富可视（投影仪制造商）
🗣️ 情景例句
Oh,
噢，
I don't know how to do that.
我不知道该怎么打。
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，