Conditionla macroexpansion
[计] 条件宏扩展
🧩 词语组成解析
[计] 宏指令扩展
🗣️ 情景例句
I need a new supply of razors and shaving cream.
我需要新的剃须刀和剃须膏。
Better late than never.
迟做总比不做好。
Ethanol is more effective at a concentration of 50-70 percent;
乙醇的浓度为50％至70％时比较有效，