Some countries offer visas on arrival.

一些国家提供落地签证。

His aim is to have a visa on arrival for tourists, but that could be years away.

他的目标是为游客提供落地签证，但这可能需要数年时间。

In contrast, Americans are able to travel to 20 of the continent's countries without a visa or secure a visa on arrival.

相比之下，美国人可以在没有签证或落地签证的情况下前往非洲大陆的 20 个国家。