Marginalist
a. 邊際主義的
??? 情景例句
Perfect! Alexandra will love it!
太好了！ Alexandra會喜歡的！
Old wood is best to burn,old horse to ride.
老柴好燒，老馬好騎。
If you don't work, you will fail to pass the exam.
如果你不學習，你考試就會不及格。