YOU SAID:

There is a fox, but not a duck.

INTO JAPANESE

狐がないアヒルがあります。

BACK INTO ENGLISH

There is a duck without a fox.

INTO JAPANESE

河豚は食いたし命は惜しし。

BACK INTO ENGLISH

Every rose has its thorn.

INTO JAPANESE

とげのないバラはない。

BACK INTO ENGLISH

Every rose has its thorn.