🧩 词语组成解析
vt. 层层排列, 使层叠（tier的过去式与过去分词形式）
seat
[sit]
n. 席位，座位;所在地;场所;臀部;
vt. 使就座;使就职;使获得座位（或席位）;可容纳若干座位;
🗣️ 情景例句
When you have a business meeting in the United States, come to the appointment on time.
当你在美国有商务会晤时，一定要按时赴约。
what's his native language?
他的母语是什么？
Quick, turn the gas off. Cover the pan. Be careful!
快，把煤气关上。盖上锅。小心！