她用简单的术语来解释复杂的科学概念。

She ___explained the complex scientific concept in simple terms.

他的回答只是对问题的表面解释，没有触及实质。

His answer was merely a ___gloss over the problem, not addressing the core issue.

这辆新车打蜡后表面有一种漂亮的光泽。

The new car has a beautiful ___gloss after waxing.