Instead of reducing your business concentration, consider providing services outside your core business or activity. In doing so, you'll add value to your account.

我会建议你考虑另一种策略：与其减低你对一个客户的依赖情度，倒不如考虑为现有客户提供主业务以外的服务，从而为你的客户增值。

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Limit Value Air concentration of chemical substances to which workers may be exposed to daily without adverse effect.

工人每天接触不至于产生不良反应化学介质的空气浓度的极限值。

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Then the water into the photoelectric colorimetry seat, instrument by comparing the color depth and ion concentration value.

然后将此水样放入光电比色座内，仪器会通过比较颜色深浅从而得到离子浓度值。

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"Gemstones are different from other kinds of mining, " Hughes says, because there's a high concentration of value in very small areas and relatively few stones.

WSJ: Secret Rocks and Gem Hunters | WSJ.Money Summer 2013

Portfolios that hold a higher concentration in small-cap stocks and value stocks have more risk than the market as a whole.

FORBES: Any Monkey Can Beat the Market