Backdoor file
[计] 秘密文件, 非法途径文件
🧩 词语组成解析
a. 秘密的
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
OK. Sit down, please. What would you like, Chinese tea or coffee?
好的，请坐。你想喝点什么，中国茶还是咖啡？
You'd better run or you're going to be left behind.
你最好跑不然你将落在后面。
The noise had been so faint that no one though that the ship had been damaged.
由于这个声音非常轻，没人会想到船身已遭损坏。