Ciel
n. 天蓝色
🗣️ 情景例句
He was a dull man and you had to explain things very slowly to him.
他脑筋迟钝，你必须慢慢地给他解释事情。
To hiss
咻咻地叫
the main complicating facts of human life must remain unintelligible.
我们才能明白人类生活中主要的复杂现象。