1、“落后”在英文中可以这么写:fall behind;lag behind; backward。 2、例句: (1)“落在后面”: fall behind;lag behind be modest and prudent, never lag behind!谦虚谨慎, 永不落后! put on a spurt, or you'll fall behind。加把劲,不然你要落后了。 (2)“不先进”: backward put an end to the backwardness of the mountainous areas。改变山区落后面貌.