My wallet was gone. I could only have left it on the G9 bus, which was now speeding in the dark to some unknown station.

我的钱包不见了。我只能把钱包留在 G9 公交车上，如今，那辆公交车正在黑暗中飞速驶向某个未知的车站。

youdao

The astronaut can send out a robot which will work on the unknown planet, collecting rocks and minerals, putting up a permanent observation station or traveling far and wide.

宇航员可以派出机器人在这颗陌生的行星上工作，收集岩石和矿物；建立永久性观察站，或向四面八方走动。

youdao

I began to practice starting from an unknown small station, to another strange small station.

我开始练习从一个陌生的小站出发，衣往另一个陌生的小站。

youdao

Reports said a trade union leader was killed by some unknown men at a bus station in Punjab early on Wednesday.

BBC: Sporadic violence marks India reforms strike