There's also a less flattering reason: denying the possibility of pure altruism provides a convenient excuse for selfish behavior.

还有一种不那么“光鲜”的原因：否定纯粹利他主义的可能性可为自私行为提供方便的借口。

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A two-factor authentication system has been replaced by a three-factor system which is more secure but less convenient.

双重认证变成了三重认证，虽然提高了安全性，但却更不方便了。

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Reading data streams and writing results to streams is convenient, because the application does not have to read a large portion of the file, much less the whole file, into memory.

读取数据流并将结果写入流是很方便的，因为应用程序不一定要将文件的大部分（更不必说整个文件）读取到内存。

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Scott Sheppard says that although it's less convenient to have a small car, he uses it for daily commuting.

NPR: North Carolina Family Takes Carbon Challenge

Less convenient to carry than a metered dose inhaler without a spacer.

CNN: Asthma inhalers: Which one's right for you?

Gold coins are often minted in smaller sizes (one ounce or less), making them a more convenient way to invest in gold than the larger bars.

FORBES: Getting Into The Gold Market