Costless
a. 没有成本的, 不需花钱的
✅ 同义词
🗣️ 情景例句
Here we go.
现在可以开始了。
Referring to your inquiry letter dated 29th September, we are offering you the following subject to our final confirmation.
关于贵方9月29日的询价信，我方就如下产品报价，以我方最后确认为准。
Some live in large groups like the honey bee, and make their nests in trees or holes in the rocks.
有些蜂如蜜蜂是群居在一起，在树上或岩洞里筑巢。