YOU SAID:

a window of opportunity will not open itself

INTO JAPANESE

機会の窓は自分自身を開くことはありません

BACK INTO ENGLISH

The window of opportunity never opens itself

INTO JAPANESE

機会の窓は決して開かない

BACK INTO ENGLISH

The window of opportunity never opens

INTO JAPANESE

機会の窓は決して開かない

BACK INTO ENGLISH

The window of opportunity never opens