behind
prep. 在...之后，迟于...，落后于，基于，追赶
例句：
Who is the girl standing behind Richard?
站在理查德后面的那个姑娘是谁？
The train was 10 minutes behind time.
火车晚到了十分钟。
Britain is behind Japan in developing modern technologies.
在发展现代技术方面英国落后于日本。
The police were hard behind the escapees.
警察正在紧追逃犯。
adv. 在后面地，落后地，迟，不如
例句：
He caught up with the parade and walked behind.
他赶上了游行队伍，跟在后面走。
The lights of the city were left behind us soon as we drove along the street.
我们驾车沿着街道一路疾驶，都市的灯光不久就被抛在我们后面。
You'll lag behind if you don't study harder.
你要是不努力学习，就会落后的。
He didn't want to fall behind in his lessons.
他不想在功课方面落后。
I fell behind in my payments.
我付款逾期了。
She was never behind in offering advice.
她在出谏言献策方面从不落于人后。