要警惕一些公司在其服务中附加的隐性费用。

Be wary of the ___hidden fees that some companies add to their services.

许多软件订阅都有隐性收费，这些费用只在第二张账单上才会出现。

Many software subscriptions have ___hidden charges that only appear on the second bill.

合同中最隐蔽的条款被埋在了文件的第五十页。

The contract's most ___hidden clause was buried in page fifty of the document.