This gas mask can immunize you against poison gas.

防毒面具能使你免遭毒气袭击。

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Now click the Immunize button at the top of the window.

现在按一下按钮，进行免疫接种，在窗口顶部。

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Now click the Immunize button at the top of the window.

现在按一下按钮，进行免疫接种，在窗口顶部。

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