?意思：交換位置，互換身份。

用法：trading places是一個常用的短語，通常用來指兩個人或者物體之間的位置或身份的交換。它可以表示一種實際的交易，也可以表示一種比喻性的轉變。

例句1：The two brothers decided to trade places for a day to see what it's like to be in each other's shoes. (這兩個兄弟決定交換一天的位置，看看對方是什么樣子。)

例句2：After the company merged with its compe, the CEO and the CFO traded places. (公司與競爭對手合并后，首席執行官和首席財務官交換了職位。)

例句3：In this movie, a poor street hustler and a wealthy businessman trade places and learn valuable lessons about life. (在這部電影中，一個窮街頭小販和一個富裕商人互換身份，并從中學到了有價值的生活教訓。)

例句4：The teacher asked the students to trade places with their classmates and present their projects in front of the class. (老師讓學生們與同學交換位置，在全班面前展示他們的項目。)

例句5：After years of being in the spotlight, the celebrity decided to trade places with a regular person for a day to experience a normal life. (在成為焦點多年后，這位名人決定與普通人交換一天的身份，體驗一下正常的生活。)

同義詞及用法：exchange positions, switch roles, swap identities, switch places, change places.