left behind的意思：留下，遗留。
left behind，美[leftbɪˈhaɪnd]，意思是留下的，遗留的。
造句
1、The giants were left behind with no goods to share or quarrel about.
巨人们被抛在后面，没有东西可以分享，也没有东西可以争吵。
2、The grandmama's book was carefully packed,and the red shawl that Miss Rottenmeier had purposely left behind.
祖母的书包装得很仔细，还有罗特麦耶小姐故意留下的红色披肩。
3、Huffing and puffing in the curb lane,traffic whizzing by just inches away,the man pedaling the cyclo is quickly left behind.
就在这名骑着三轮车的男子在路沿边喘息的功夫，车辆在几英寸外呼啸而去，他就迅速被甩在后面了。
