Walters was initially fined US$ 4,000 for violations under U. S. Federal Aviation Regulations , including operating an aircraft within an airport traffic area '' without establishing and maintaining two-way communications with the control tower . ''
At first , Walters was fined US$ 4,000 for breaking U. S. Federal Aviation Regulations .
At first , Walters was fined US$ 4,000 for breaking U. S. Federal Aviation Regulations .
为该句子写一个更简单的版本: Walters was initially fined US$ 4,000 for violations under U. S. Federal Aviation Regulations , including operating an aircraft within an airport traffic area '' without establishing and maintaining two-way communications with the control tower . '' 输出: