cloth made by sewing together a lot of smaller pieces of cloth with different patterns and colours, or the activity of doing this

a patchwork quilt/jacket 百衲被／拼布绗缝的夹克衫

The old lady sat in the corner doing patchwork. 那个老太太坐在角落里做些缝补活。

a mixture of different things

We looked out of the aircraft window down onto the patchwork of fields below. 我们从飞机的舷窗俯视下面纵横交错的田地。