YOU SAID:

Penguins are cold, flightless, and overall cool.

INTO JAPANESE

ペンギンは寒く、飛べない、全体的に涼しいです。

BACK INTO ENGLISH

Penguins are cold, can't fly, and are cool overall.

INTO JAPANESE

ペンギンは寒くて飛べず、全体的に涼しいです。

BACK INTO ENGLISH

Penguins are cold and can't fly, and are cool overall.

INTO JAPANESE

ペンギンは寒くて飛べませんし、全体的に涼しいです。

BACK INTO ENGLISH

Penguins are cold and can't fly, and are cool overall.