Security maintenance
[计] 安全维护
🧩 词语组成解析
🗣️ 情景例句
His excuse sounds unconvincing.
他说的理由好像不可难。
It's a shame these instructions are so complicated.
真遗憾，这些说明太复杂了。
I wanted to ask Chen Wei too, but he's away.
我也想请陈伟，但他外出了。