Common things are to write a message that thanks for the love she has given you, send her a card or buy her a gift.

常见的做法是写一条消息感谢她给你的爱，送她一张卡片或给她买个礼物。

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One common technique for authentication is to use physical tokens, such as a key, a credit card, or a smart card.

认证的一种常用技术是使用物理标记，例如钥匙、信用卡或智能卡。

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Extended enterprise: Credit card approvals and charges, as well as any outsourced components such as shipping use these very common e-commerce functions.

扩展的企业(Extended enterprise)：信用卡的确认和支付以及送货等外包业务是非常常见的电子商务功能。

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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

Attire is the most common wild card in same-sex weddings, so it's important to find out what they're wearing, she said.

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Perhaps not so surprising is that credit card fraud is more common than debit card fraud in most of the 17 countries.

FORBES: Countries With The Most Card Fraud: U.S. And Mexico

"Buying products over the Internet with a credit card has become a common occurrence, but viewing the credit card bill itself and submitting a payment to settle it electronically is still considered a novelty, " Albert Pang, research manager for IDC's eCommerce Software program, said in a statement.

CNN: Online bill payment becoming popular with consumers