He couldn't afford the fare to Australia, so he worked his passage.

他负担不起去澳大利亚的船费，因此，他在船上做工以抵偿船费。

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Experts say it was customary to place a coin in the mouth of an inhumation as a fare for the ferryman Charon for safe passage across the River Styx in the afterlife.

BBC: Archaeological dig uncovers Roman activity near Stroud