At the top of the list is the notion that intelligence is measured by your ability to solve complex problems; to read, write and compute at certain levels; and to resolve abstract equations quickly.

最重要的一点是，智力是通过你解决复杂问题的能力来衡量的；一定的读写和计算能力；能快速解出抽象方程。

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Bosses: Evil bosses will show up at certain levels. Be careful.

老板：恶老板会显示在一定的水平。要小心。

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But silver can also accumulate in the environment and, at certain levels, prove toxic.

但银同样也会在环境中积累，当其达到一定浓度时将有毒性。

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The Dow's inability to finish above 13000 echoes the market's previous stalls at certain levels.

WSJ: Dow Touches 13000 but Can't Hold On

Sure, the writer dutifully cited the number of Bible studies and commitments to Christ among football players at certain levels, as facilitated and tracked by groups such as the Fellowship of Christian Athletes.

FORBES: Sports Illustrated Clotheslines God, Christians and Football

Such a program would cap greenhouse gas emissions at certain levels, and allow more efficient energy producers to sell emissions permits to other, less efficient companies, thereby creating market-wide incentives to reduce carbon output.

CNN: McCain: Clean energy a 'national security issue'