YOU SAID:
There'd better be a good explanation for this
INTO JAPANESE
これは良い説明が良いだろう
BACK INTO ENGLISH
This is good a good explanation would
INTO JAPANESE
これは良い説明が良い
BACK INTO ENGLISH
This is a good explanation.
INTO JAPANESE
これは良い説明です。
BACK INTO ENGLISH
This is a good explanation.
Come on, you can do better than that.