Constraint qualification
[计] 约束备格
🧩 词语组成解析
🗣️ 情景例句
He said I should call him.
他说我可以打电话给他。
Besides the required courses, I'm taking an elective in the Lab Science.
除必修科目外，选修科目我选了实验科学。
It then sends these signals down an ordinary telephone line to another fax machine, which changes the signals back into the shapes of letters.
然后把这些符号通过一条普通的电话线送到另一台传真机上，传真机又把符号变为字母形状。