这款护肤品含有天然成分，是皮肤保湿的良好增强剂。

This skincare product contains natural ingredients that act as excellent ___enhancers for skin hydration.

这款视频增强器能让模糊的画面变得清晰。

This video ___enhancer can make blurry footage look sharp.

研究人员发现这些DNA片段可以作为特定基因的增强子。

Researchers found these DNA segments function as ___enhancers for particular genes.