YOU SAID:

a part of the rest of the parts has fallen off and decayed

INTO JAPANESE

残りの部分の一部が脱落して腐敗した

BACK INTO ENGLISH

Some of the rest fell off and rotted

INTO JAPANESE

残りのいくつかは落ちて腐った

BACK INTO ENGLISH

Some of the rest fell and rotten

INTO JAPANESE

残りのいくつかは落ちて腐った

BACK INTO ENGLISH

Some of the rest fell and rotten