First, tourism is a great source of tax revenue.

首先，旅游业是税收入的一个巨大来源。

youdao

The stakes are high: the City of London is a huge source of tax revenue for Britain (though not as big as it once was).

其风险很高：伦敦城对英国人而言是个巨大的税收来源(尽管不像曾经那样辉煌)。

youdao

The gas (petrol) tax, the main source of revenue for transport, has remained flat since 1993.

天然气(燃油)税收作为交通经费的主要来源自1993年以来就处于地位运行且表现平平。

youdao

The Bloomberg administration considers waterfront revitalization one of its achievement and a vital source of tax revenue.

WSJ: Reshaping Shore Homes

The underground economy would then become a source of tax revenue.

FORBES: Guest Post: National Sales Tax, Balanced Budget

Income from value added tax, the government's biggest source of tax revenue representing about 36 per cent of the total, has been falling since 2008, despite a sharp increase in the rate -- the main rate is now 23 per cent.

CNN: Portugal braced for 'fiscal earthquake'