偶然间看见   “the morning, afternoon, evening, night, day, week, month, year等表示“一年、一上午”等 引导从句

We were there the week it snowed so heavily. 下大雪的那一周我们正在那里。

He got ill the day he arrived home. 他回家那天生病了。

I met him the year I was in Chicago. 我在芝加哥的那年遇到过他。

He left Europe the year World War II broke out. 第二次世界大战爆发的那一年，他离开了欧洲。

The first two days he stayed with me in that back room he was very peaceful. 他同我呆在后房的头两天还很安静。

On the day that I retire I shall receive a cheque of a thousand pounds. 我退休的那天将得到一张一千英镑的支票。

 spring, summer, autumn, winter表示“整个季节”。

Alice had a son the spring her husband went abroad. 丈夫出国的那年春天，爱丽丝生下了一个儿子。

The summer Mary was fourteen her family travelled to the country as usual. 玛丽14岁的那年春天，她全家与平常一样去那个国家旅行。

The winter he was killed in an accident, he was at the peak of his career. 遇车祸身亡的那年冬季，他正处于职业生涯的顶峰。

请详细解释一下！