🧩 词语组成解析
three
[θri]
num. 三;三个;第三（章，页等）;
n. 三岁;三个人[东西];三，三个;
adj. 三的;三个的;
year
[jɪr]
n. 年;年纪;一年的期间;某年级的学生;
old
[old]
adj. 老的;古老的;以前的;（用于指称被替代的东西）原来的;
n. 古时;
🗣️ 情景例句
A cookie can't hurt, though.
但一片小甜饼不要紧。
I went to see my doctor for a check-up yesterday.
我昨天为检查去看了医生。
The question was, which one?
问题是，哪一种气体导致火灾呢？