But the company has also been trying to make security a source of revenue.
不过，这家公司还企图把安全作为盈利来源。
It would give them a steady source of revenue.
这将为他们提供一个稳定的收入来源。
That can be worth it, but it's never a direct source of revenue.
虽然这可能是值得的，但是这却从来不是直接的收入来源。
Tax is a main source of a country's revenue.
税收是国家财政收入的重要来源。
Income taxation is a major source of revenue in developed countries.
课税是发达国家的主要税收来源之一。
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。
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。
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