Expound upon
对…进行阐述
🧩 词语组成解析
upon
[ə'pɑn]
prep. 在…上面;当…时候;
🗣️ 情景例句
I made an appointment with the doctor at three.
我和医生约好3点钟看病。
I meet the boy whose aunt is a typist.
我遇到那个男孩的姑妈是打字员。
This note is only a reminder.
谨此提请注意。