YOU SAID:

I'm useless, but not for long

INTO JAPANESE

私は無駄がなく、長い間

BACK INTO ENGLISH

I will not waste a long time

INTO JAPANESE

私は長い時間を無駄にしません。

BACK INTO ENGLISH

I won't waste time.

INTO JAPANESE

私の時間を無駄にしません。

BACK INTO ENGLISH

Not wasting my time.

INTO JAPANESE

私の時間を無駄にしません。

BACK INTO ENGLISH

Not wasting my time.