working

She has a difficult working relationship with many of her employees.

她与很多员工的工作关系都不好。

It is essential that all working components are well lubricated.

给所有运转部件适时上润滑油是非常重要的。

She's fluent in French and English and has a working knowledge of Spanish.

她法语和英语说得都很流利，西班牙语也能应付。