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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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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But there is another sort of cost involved in holding back the easy instinctive response and checking that you are genuinely doing something for the sake of long-term building or healing.

但我们也付出了另一种代价，使我们需要克制本能反应，仔细考量自己确实正在为长久的建设与恢复事业做着什么。

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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.

FORBES: Higher Inflation Is On The Way

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).

FORBES: Three Ways To Tell If Pain Or Pleasure Ahead For Wells Fargo