Mother constantly picked at him for being sloppy.是什么意思？

Mother constantly picked at him for being sloppy.

母亲不断地批评他衣着不整。

mother

n. 母亲，妈妈，女修道院院长，大娘；vt. 像母亲般地照顾，养育，溺爱；

例句
I felt I had adjusted to the idea of being a mother very well...
我感到自己已经完全接受了当妈妈的想法。

constantly

adv. 不断地，时常地，始终，一直；

例句
Her dedication constantly astonishes me.
她的奉献精神总是让我震惊。

picked

adj. 精选的，摘下的；v. 采( pick的过去式和过去分词 )，摘，啄，

例句
He picked up the sheets of paper, and balled them tightly in his fists...
他抓起那几张纸，在手里紧紧攥成团。

at

prep. （表示位置）在，在（某时间或时刻），以，达， 向，朝；n. 阿特（老挝辅币单位，100 阿特 = 1 基普）；

例句
Prices start at £13.95 a metre for printed cotton...
印花棉布以每米13.95英镑的价格起售。

him

pron. (he的宾格)他；

例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

being

n. 存在，生物，人，要素，本质；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

sloppy

adj. 懒散的，草率的，稀薄的，多雨的，泥泞的，过于伤感的；

例句
Fashion today is sloppy mediocrity.
如今的时尚品位低下，平庸无奇。