前往澳大利亚的航程漫长而充满挑战。

The ___voyage to Australia was long and challenging.

他们为期三年的环球航行是一次不可思议的冒险。

Their three-year ___voyage around the world was an incredible adventure.

美国国家航空航天局计划在未来十年内进行一次载人火星航行。

NASA is planning a manned ___voyage to Mars in the next decade.