Either one goes forward or he will be left behind.

不进则退.

《现代汉英综合大词典》

A boat sailing against the current must forge ahead or it will be driven back.

逆水行舟,不进则退.

《现代汉英综合大词典》

Study is like sailing against the current ; either you keep forging ahead or you keep falling behind.

学如逆水行舟, 不进则退.

《现代汉英综合大词典》

Given this pressing situation, we must move forward , or we will fall behind.

形势逼人, 不进则退.

汉英非文学 - 十六大报告

Life never stands still : if you don't advance you recede.

生命不息,不进则退.

互联网

Competition in the market as Nishuixingzhou, keep falling behind.

市场竞争有如逆水行舟, 不进则退.

互联网