1.best-known 最有名的
Indy race is the best-known American automobile race and one of the most popular American sports events.
印地赛是美国最著名的汽车比赛,也是美国最受欢迎的体育赛事之一
2.tricky to do 做……是棘手的
Core beliefs can be tricky to locate.
定位核心信念并非易事
3.rampant 猖獗的
The country is an economic basket case with chronic unemployment and rampant crime.
这个国家处于非常糟糕的经济状态,到处都是长期失业的人和猖獗的犯罪行为
4.available to sb 对某人来说可用
A doctor has a wide range of therapeutic measures available to him.
医生有各种各样的治疗措施可以采用