YOU SAID:

That's a rare lapse in my normally calm demeanour

INTO JAPANESE

それは普通の穏やかな態度のまれな経過です

BACK INTO ENGLISH

It is a rare progression of normal calm attitude

INTO JAPANESE

それは普通の静かな態度のまれな進歩です

BACK INTO ENGLISH

It is a rare advance of a normal quiet attitude

INTO JAPANESE

それは普通の静かな態度のまれな進歩です

BACK INTO ENGLISH

It is a rare advance of a normal quiet attitude