File extension specification
[计] 文件附加说明表
🧩 词语组成解析
file
[faɪl]
vt. 提出（离婚诉讼或其他讼案）;把…归档;用锉锉;发稿，寄给报社;
vi. 发送（报道给报社）;排成一行行走;提出申请;
n. 文件（夹）;档案;纵列;锉刀;
fil线+e → 用线穿成的→ 档案
🗣️ 情景例句
Good afrernoon, Miss Wang. Please sit down.
下午好。王小姐，请坐。
My brother wants to learn how to swim.
我的兄弟要去学游泳。
It's very hot. It's summer in Australia now!
很热。澳大利亚现在正值夏天！