Hapke's phenomenon
[医] 哈普克氏现象(双胎第一胎儿顶先露)
🧩 词语组成解析
🗣️ 情景例句
when I was about eighteen years old.
那时我差不多十八岁。
I will be going to school in September.
我将在九月份上学。
What do the farmers do with your machines?
农民用机器做什么呢？