Costless
a. 没有成本的, 不需花钱的
✅ 同义词
🗣️ 情景例句
I'll call in the morning and set up an appointment to see him.
我明天早上就打电话给他， 跟他约个时间去看他。
I wish I were running across an open field.
我真希望在原野奔跑。
Can you put me in the picture about the World Cup Football Match?
你能给我讲讲关于世界杯足球赛的状况吗？