[倒灌, dào guàn, ㄉㄠˋ ㄍㄨㄢˋ]backup; reverse flow; waterway backs up from downstream to upstream (because of blockage, tide, wind, earthquake etc)#56816[Add to Longdo]
[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 tuì, ㄒㄩㄝˊ ㄖㄨˊ ㄋㄧˋ ㄕㄨㄟˇ ㄒㄧㄥˊ ㄓㄡ, ㄅㄨˋ ㄐㄧㄣˋ ㄗㄜˊ ㄊㄨㄟˋ]Study is like rowing upstream: no advance is to drop back[Add to Longdo]