Simon's sign
[医] 西蒙氏征(吸气时脐部收缩或固定)
🧩 词语组成解析
🗣️ 情景例句
I'm taking 19 credit hours.
我修了十九个学分。
You should take the advice of your teacher.
你应该听老师的话？
Nice to meet you.
很高兴见到你。