usage

Seat belt usage in the state is now mandatory.这个州强制使用安全带。

Usage [=use] of this exit is prohibited.这个出口禁止使用。

drug usage among college students大学生当中的吸毒情况

Restaurant dishes must be able to withstand rough usage.餐馆的餐具必须能经得住不太讲究的使用。

efforts to reduce water/energy usage减少用水量/能源用量的努力

increasing usage of the nation's highways不断增长的国道利用率

This word occurs in casual/common/popular usage.这个词出现在非正式/常用/流行用法中。

differences between British and American usage英美用法的不同之处

educated/formal usage正规/正式用法

I came across an uncommon usage I'd like to discuss with you.我偶然发现了一个罕见的用法，想与你讨论一下。