Three-tier
[医]三层
🧩 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;
tier
[tiə]
n. 等级;阶梯座位等的一排，一行，一层;包扎工;
vt. 层层排列，使层叠;
vi. 成递升排列，层叠;
🗣️ 情景例句
He's going up the ladder pretty quickly.
他真是平步青云。
I'm feeling rather blue.
我觉得有些沮丧。
One day a young man named Kunta Kinte went off into the forest to cut down a tree as he wanted to make a drum.
有一天，一位叫孔塔·肯特的年轻人走进森林中去砍树，因为他想做一个鼓。