Abstrusity
n. 难解, 深奥
🗣️ 情景例句
While it may be cold outside, it's always warm here in the office.
外面可能很冷的时候，办公室里面总是很暖和。
I also want to express my gratitude to all of my teachers over the years.
另外，我还想感谢这个多年来所有教过我的老师。
and he estimated that there were more than 2,250,000 in one acre;
他估计每英亩草坪里有225万多只蜘蛛。