buffer

这种缓冲液可以保持溶液的酸碱度稳定。

This ___buffer solution helps maintain stable pH levels.

多穿几层衣服可以缓冲寒冷天气的影响。

Wearing layers can ___buffer the impact of cold weather.

人力资源部经常充当员工和管理层之间的缓冲。

HR often acts as a ___buffer between employees and management.