1. As time passed and work with their respective first clients became more and more difficult, John and Sue realized that they had been assigned two of the toughest clients in town. 随着时间的流逝，和他们各自的第一批客户一起工作变得越来越困难，约翰和苏意识到他们被分配给了镇上两个最难对付的客户。
2. He faces the toughest test of his leadership so far. 他面临迄今为止对自己的领导工作最严峻的考验。
3. This is the toughest crime bill that Congress has passed in a decade. 这是十年来国会通过的最强硬的有关犯罪的议案。
4. He is the toughest military ruler yet and has responded harshly to any dissent. 他是迄今最苛刻的军事统治者，残酷地回应任何异议。
5. Malaysia has emerged as the toughest critic of the North's environmental attitudes. 马来西亚已成为对北方发达国家环境态度的最强硬的批评者。
