彼とは十年来の相棒で、どんな仕事も二人でこなしてきた。
He's been my partner for ten years, and we've handled every job together.
刑事は相棒と一緒に容疑者の家を張り込んだ。
The detective staked out the suspect's house with his partner.
このカメラは旅先での僕の頼れる相棒だ。
This camera is my trusty companion when I travel.