另一个答案是外星人已经造访过地球，发现我们的星球太原始太枯燥，根本不值得在星际旅游的导游册中浪费笔墨。

Another is that aliens visited Earth and found our planet so dull that we didn't even merit a rating on their interstellar travel guide.

youdao

不要一个人去原始森林旅行，太危险了。

Don't travel to the virgin forest. It's too dangerous.

youdao

不要一个人去原始森林旅行，太危险了。

Don't travel to the virgin forest. It's too dangerous.

youdao