Non-gratuitous
有偿行为
🧩 词语组成解析
non
[[nɔn]]
adv. 非, 不
🗣️ 情景例句
I hope you will excuse me.
希望你能原谅我。
Please don't let the dog come in the house.
请别让狗进到屋子里。
The tunnel would be well-ventilated if tall chimneys were built above sea level.
隧道就具备了良好的通风条件。