🧩 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
Public transportation is quite convenient in this city.
在这个城市里，公共交通很方便。
We have an extended warranty available at extra cost.
对于额外价钱我们有较长的保证期限。
Somebody's knocking at the door. I'll answer it.
有人在敲门，我去开。