Trapezoidal generator
[电] 梯形产生器
🧩 词语组成解析
梯形的
🗣️ 情景例句
Because I am still standing here firmily on my feet.
我仍然好端端地站在这里。
She never showed up.
她一直没有出现。
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，