请尝试以下命令：
echo "(After Sweet Memories) Play Born To Lose Again" | tr '(' '-' | tr ')' '-' | tr ' ' '-'
-After-Sweet-Memories--Play-Born-To-Lose-Again
（注意双--）
我无法修改命令并传递一个（空）值，而我必须传递另一个 -
看到这个例子和这个错误：
echo "(After Sweet Memories) Play Born To Lose Again" | tr '(' '' | tr ')' '' | tr ' ' '-'
tr: tr: when not truncating set1, string2 must be non-emptywhen not truncating set1, string2 must be non-empty