Heptad
n. 七个, 成七的一组, 七价原子\\n[化] 七价物; 七价的
🗣️ 情景例句
It makes a tremendous difference to me.
这对我来说差别极大。
Who are you?
你是谁？
She will have something to drink but she will not eat any solid food.
她将喝些饮料，但不吃固体食物。