Take a sheet of paper and draw a line down the middle.

　　拿出一張紙，在中間畫一條線。

　　She's the middle child of three.

　　三個孩子，她是老二。

　　The village has a history going back to the Middle Ages.

　　這個村子的歷史可追溯至中世紀。

　　I should have finished by the middle of the week.

　　我在這周過半的時候應該就能完成。

　　His eyes were fixed on a small house in the middle distance.

　　他凝視著不遠處的一座小房子。