老师用一个简单的例子来解释这个复杂的数学概念。

The teacher ___explained the complex math concept with a simple example.

那位发言人试图用含糊的言辞掩饰公司的问题。

The spokesperson tried to ___gloss over the company's issues with vague statements.

她给家具上了一层光泽漆，让它看起来更亮丽。

She ___polished the furniture with a shiny coat to make it look more vibrant.