metric

这首诗采用了传统的五音步格律结构。

This poem follows a traditional five-foot ___metrical scheme.

网页加载速度是衡量用户体验的重要指标。

Page load speed is an important ___metric for measuring user experience.

大多数国家使用公制作为测量标准。

Most countries use the ___metric system as their standard of measurement.