Lightheartedness
n. 自由自在, 无忧无虑
🗣️ 情景例句
Pretty good, but I got caught in a traffic jam in Beijing.
很好，不过在北京碰上了交通阻塞。
You may know the horse by his harness.
欲知马如何，可看套马索。
or of the habits of the social insects, let us say.
和昆虫群居的习性