您可以使用

You can use filterKeys:

val ab = abc.filterKeys { it in keys }

由于它是Kotlin，您甚至可以定义自己的扩展功能完全达到您的想象:

And since it is Kotlin, you could even define your own extension function to achieve exactly what you imagined:

fun <T> Map<T, *>.slice(keys: Iterable<T>) = filterKeys { it in keys }

val ab = abc.slice(keys)