英语翻译The pool whose line was clamped down with clothes pin.中的

英语翻译
The pool whose line was clamped down with clothes pin.中的line 是什么?或者翻译下句子
When filled to the rim the shallow water reached right below my knee.中的rim 是什么?
挺着急的,词语需要准确,如实.
When filled to the rim the shallow water reached right below my knee.But it didn' t stop us from splish-splashing away many hot summer days.
Patience was not a virtue that my dad possessed,which is why our pool in the neighborhood whose line was clamped down with clothes pins.
谁能给我讲将衣夹是个什么样子?
那就是为什么我们家的游泳池是街邻里唯一一个界线由衣布条固定的.怎么改?