After a few long moments I figured out that I needed to slide my room key through a mostly hidden card reader to the side of the control panel.

用了很长时间我才弄明白原来我需要把自己的房卡在电梯控制板旁边的一个隐蔽的读卡器里刷一下。

youdao

No one knows until the end of the game whose hidden card is the winner.

VOA: special.2009.11.22

But they also have a right not to get ripped off by the sudden rate hikes, unfair penalties and hidden fees that have become all too common in our credit card industry,"

VOA: standard.2009.05.09

She likened the fees to a hidden tax on card holders.

NPR: Consumer Groups Seek Cap on Credit Card Fees

Once tokenized and hidden, any given card product is far more vulnerable to being displaced, as the issuers have already learned from PayPal.

FORBES: Tokenization And The Collapse Of The Credit Card Payment Model

We cracked down on unscrupulous lenders and credit card companies that charge hidden fees.

WHITEHOUSE: The White House