Add a layer mask to this layer as shown below, this will create a better lighting contrast for the hand and make this overall image look better.

按照下面的样子，添加一个图层蒙版，这样可以给整个画面增加整体光的对比度，画面看起来会更好一些。

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The Japanese sites let members mask their identities, in distinct contrast to the real-name, oversharing hypothetical user on which Facebook’s business model is based.

日本网站允许用户隐藏自己的真实身份，这和实名的，以分享为前提的Facebook商业模式完全不同。

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In contrast to his colleague, he has no mask.

与他的工友形成对比的是，他并没有戴口罩。

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