Difference expression
[计] 差分表示式
🧩 词语组成解析
🗣️ 情景例句
Are you carrying any items that need to be declared?
你没有携带需要申报的东西吗？
Sailboats glided motionlessly across the lake.
帆船静静地像滑动似的在湖上前进。
Normal people tend to forget this process unless and until they are reminded of it.
衰老的过程，不经提起，正常人容易忘记；一经提醒，才会记起。