Isoquant
等量曲线
🗣️ 情景例句
She couldn't get over her shyness.
她无法克服羞怯。
What's the round-trip fare?
来回票价多少？
Insuring public or private property is a standard practice in most countries in the world.
承办公共财产或私人财产保险是世界上大部分国家的正常业务。