On one side of the main entrance there's a red plaque.

大门口的一侧有块红色匾牌。

《柯林斯英汉双解大词典》

The soft red stain is bacterial plaque.

这种暗红色的染色是菌斑。

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Plaque psoriasis often results in patches of thick, red or inflamed skin covered with silvery scales known as plaques.

斑块型银屑病斑块经常与著名的银色鳞片覆盖厚，红色或发炎的皮肤补丁的结果。

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