When timeouts are expected, the cost of checking for null is lower than the cost of catching an exception.

当预料会超时的时候，检查是否为null的成本低于捕获异常的成本。

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Avoid the high cost of being connected via your smartphone by only checking your email in Wi-Fi zones, especially when traveling overseas.

只在无限网络覆盖区域内使用智能手机查收电子邮件，以避免高额的网络连接费用，特别是当你在国外旅行的时候。

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For longer business trips, the cost of dry cleaning may be cheaper than checking extra luggage for additional shirts and pants.

对于时间更长的商务旅行，干洗的费用也比托运额外的行李和衣物便宜。

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The cost of handling a checking account is roughly the same as it was 20 years ago.

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In addition, higher short-term interest rates increase the opportunity cost of holding currency and checking accounts, and therefore will lead to an increase in the turnover or velocity of money.

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The high net interest margins at Wells Fargo have, in large part, been attributed to its large low cost average core deposits (which include noninterest-bearing deposits, interest-bearing checking, savings certificates, market rate and other savings, and certain foreign deposits).

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