YOU SAID:
I cannto sepll propelry
INTO JAPANESE
私は推進力を分離することはできません
BACK INTO ENGLISH
I can't separate propulsion
INTO JAPANESE
推進力を分離できません
BACK INTO ENGLISH
Propulsion cannot be separated
INTO JAPANESE
推進力を分離できない
BACK INTO ENGLISH
Propulsion cannot be separated
That didn't even make that much sense in English.