要不是辦像釀酒廠或保險公司這樣的副業，他們沒有多少人只靠藝術就能過的舒舒服服。
Few of them managed to make a good living out of their art alone, without running a sideline such as a brewery or an insurance office.
他在干一個有收益的副業－－－－向遊客出售明信片。
He runs a profitable sideline selling postcard to tourist.
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