Cosmetics are often used to conceal facial blemishes.

化妆品常用来遮盖脸部色斑。

Removal of spot: freckles, lentigines, point and flakecolored spot, melasma, coffee spot, etc.

3、除斑：雀斑、雀斑样、状色斑、黄褐斑、咖啡斑等。

The paper chromatography-mottle elution chronometry is established which is a simple and convenient and accurate method of quantitatively determining L-leucine.

建立了一种比较简便、准确的定测定发酵液中L-亮氨酸的"纸色谱—色斑洗脱比色法"。