Cycloaddition
n. [化]环加成( 指不饱和分子化合成一环状化合物的反应)
🗣️ 情景例句
Today, trade imbalance between the United States and our country is becoming worse.
当前美国与我国间的贸易不平衡问题正日益恶化。
Truth fears not the flames of slander and injustice.
真金不怕火。
The clouds had come down so suddenly we had no warning.
乌云突然出现，我们丝毫没有觉察。