All scaffold should be marked by blue marker before block final inspection, and the marker should be round and easily found.

大厦最终检查之前，所有的脚手架应该用蓝色记号标出，记号应呈圆形且易于发现。

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Sometimes I block out my value composition in grey washes of marker inks-not worrying about color.

有时，我使用灰色的标示墨水来勾勒出色值构成，而将色彩置之不理。

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Analysis of the brains of the euthanized rats revealed decreased levels of Fos, a protein marker of neuronal activity, in the amygdala region of the brain while the olfactory signals appeared to block fear responses.

WSJ: Why Children Have More Control of Their Dreams