力波垫：垫子的弹性以及滑度必须在赛前经由世界跆拳道联盟认证通过。

Elastic mat: the degree of elasticity and slipperiness of the mat must be approved by the WTF before the competition.

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调查发现，2009年航空公司的整体客户满意度连续第三年下滑，创下了四年的新低。

The study finds that overall customer satisfaction with airlines in 2009 has declined for a third consecutive year to a four-year low.

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第三步：将着色的选项打钩（画圈的选项），然后将饱和度的滑条拉到最左面。

Step 3 : Click the colorize checkbox (circled in red below), and pull the Saturation slider all the way to the left.

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