(v) take position in the rear, as in a military formation or in the line of scrimmage in football, Example:The defender dropped back behind his teammate
[学如逆水行舟,不进则退 / 學如逆水行舟,不進則退, xué rú nì shuǐ xíng zhōu, bù jìn zé tuìㄒㄩㄝˊ ㄖㄨˊ ㄋㄧˋ ㄕㄨㄟˇ ㄒㄧㄥˊ ㄓㄡ, ㄅㄨˋ ㄐㄧㄣˋ ㄗㄜˊ ㄊㄨㄟˋ] Study is like rowing upstream: no advance is to drop back