It is profitless to continue arguing.
继续争论是无益的。
Let us have no part in profitless quarrels.
我们不要卷入毫无意义的争吵之中。
Why should we spend so much time on the profitless matter?
我们为什么要花如此多的时间在这无益的事情上？
Revising the procedure was an entirely profitless exercise.
对程序进行修改是徒劳无功的。
Revising the procedure was an entirely profitless exercise.
对程序进行修改是徒劳无功的。
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