它还是重要，只是改头换面了而已。 在过去，共和党拿种族做文章，使竞选对手看起来是反白人的。

In the past, Republicans often used race to make their opponents seem anti-white.

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白口和反白口缺陷是球铁件转向节的常见缺陷。

Both the chill and reverse chill are defects often found in the nodular iron knucle castings.

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在病人摄片及后处理过程中主要应用的DR成像技术有窗宽、窗位调整、反白技术、局部放大等。

The DR technology that were applied included : changes of the level of window and window width, reversion of black and white, zoom, et al.

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