211.About six years ago I was eating lunch in a restaurant in New York City vrrhen a woman and a young boy sat down at the next table;I couldn't help overhearing parts of their conversation.

英語四級譯文:
大概六年前我在紐約市的一家餐廳正吃著飯，一位婦女和一個小男孩在鄰桌坐了下來，于是我無意中聽到了他們的對話。

四級詞匯講解:
本句包含兩個分句。前一個分句的主干是I was eating lunch，其前的About six years ago是介詞短語作狀語，其后的when a woman and a young boy sat down at the next table為狀語從句。后一個分句的主干是I couldn't help overhearing parts。

couldn't help doing是個固定表達，意為“禁不住做某事，情不自禁地做某事”。如:
She couldn't help smiling.她禁不住笑了起來。

overhear意為“無意中聽到，偷聽到”。如:
I happened to overhear what he said.我碰巧聽到他說的話。