niche

The small bakery found a niche by selling gluten-free and vegan pastries.

(Chinese) 这家小面包店通过销售无麸质和纯素糕点找到了自己的小众市场。

He managed to carve out a niche for himself as a specialist in antique clock repair.

(Chinese) 他成功地为自己开辟了一个作为古董钟表修理专家的细分市场。