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fNwC.DlF0T0OrYyL4[。

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TKy2[-cv1%N~.gcCg。

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XVZx^uYK@qNT3mkBn。

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vAFwk0ckqpX。