YOU SAID:
I don't get the concept of excersize.
INTO JAPANESE
私はexcersizeの概念がわかりません。
BACK INTO ENGLISH
I do not understand the concept of excersize.
INTO JAPANESE
私はexcersizeの概念を理解していません。
BACK INTO ENGLISH
I do not understand the concept of excersize.
Come on, you can do better than that.