We can't afford any unnecessary expenses.

我们负担不起任何不必要的支出。

We've got a good experienced team in the company. It would've been an unnecessary expense.

我们公司的团队有良好的经验。这会是一个不必要的开支。

While some believe that it can unite nations, others view it as an unnecessary expense.

有些人认为它可以团结国家， 而另一些人则认为这是不必要的开支。

In those corrupted governments, where there is at least a general suspicion of much unnecessary expense, and great misapplication of the public revenue, the laws which guard it are little respected.

在那些腐败的政府中，至少人们普遍怀疑有大量不必要的开支，公共收入被严重滥用，保护这些收入的法律却很少受到尊重。