研究顯示 陌生人到密友大約需要200小時

A University of Kansas professor has defined the amount of time necessary to make a friend and how long it typically takes to move through different stages of friendship.
近日，美國堪薩斯大學的一位教授定義了交友所需的必要時間，以及發展至友誼不同階段通常所需的時間長度。

In a new paper published in the Journal of Social and Personal Relationships, Professor Jeffrey Hall found that it takes roughly 50 hours of time together to move from mere acquaintance to casual friend, 90 hours to go from that stage to simple "friend" status, and more than 200 hours to become "good friends".
在《社會與人際關係雜誌》最新發表的論文中，傑弗理·霍爾教授發現，兩位點頭之交成爲一般朋友需要相處約50個小時，變成真正意義上的朋友需要90小時，成爲好友則需要超過200小時。

This means time spent hanging out, joking around, playing video games and the like. Hours spent working together just don't count as much.
這裏指的時間是花在諸如一起外出、開玩笑、玩視頻遊戲等活動上的時間，一起工作的時間不算。

Coworkers can be still become friends, of course, but you need to spend time together outside of the workplace for it to happen.
當然，同事之間仍然可以成爲朋友，但你需要在工作場所以外多找機會相處才行。

"The amount of time and the type of activity shared with a partner can be thought of as strategic investments towards long-term belongingness needs," wrote Hall.
霍爾寫道：“與夥伴一起度過的時間和與之共同進行的活動類型，都可視作對長期歸屬感需要的戰略投資。”

Give the people you like your time, hope they'll give you theirs, and stay focused on having a good time. Friendship will follow.
給你喜歡的人你的時間，希望他們會給你他們的時間，保持專注並玩得開心。友誼也必將隨之而來。