take on = 承担. example: I will take on the responsibility if you don't. take up = 占用, 接纳. example: He takes up the mother's role as well after his wife died. take in = 摄取, 参加 example: Anybody will be taken in of the natural beauty of this valley take back = 取回, 收回 example: since you hate this sweater, I will take it back to the store.
