“中间的”用英语怎么说

制服上装中间的纽扣在他的肚子上绷得紧紧的。The middle button of his uniform jacket was strained over his belly.上天就像导演电影那样安排我们的人生，中间的起起伏伏，为的只是最后的完美收场。God's plan is like a movie. All the good and bad things are arranged together for the go...