Unit development file
[计] 单位研制文件
🧩 词语组成解析
unit
['ju:nit]
n. 单位，单元;装置;个体;[数]单位数;
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
Richard feels we need to find a small house. Richard
觉得我们需要一个小住宅。
To play with the frog
逗青蛙玩
As soon as I tap on the window, you must stop within five feet.
我一敲车窗，你必须把车停在5英尺之内。