这座城市的交通系统是欧洲最高效的之一。

The city's transport system is one of the most ___efficient in Europe.

我们需要一个真正高效的人来组织办公室并使其顺利运行。

We need someone really ___efficient who can organize the office and make it run smoothly.

工作人员非常礼貌高效，氛围亲密而放松。

The staff were so courteous and ___efficient, and the atmosphere was intimate and relaxing.