Costless
a. 没有成本的, 不需花钱的
✅ 同义词
🗣️ 情景例句
You think so?
你想会是这样吗？
I wrote music scores last night.
我昨晚在写歌谱。
Hi, Lin Tao! What are you going to do on Sunday?
嗨，林涛！星期天你打算干啥？