niche
noun [ C ] uk/niːʃ/ us/nɪtʃ/
(POSITION)
（尤指本人合意的）适合的工作（或职位）;称心的工作
a job or position that is very suitable for someone, especially one that they like
He has carved/made a niche for himself as a financial advisor. 他成为了财务顾问，为自己找到了合适的发展方向。
合宜的小环境
an area or position that is exactly suitable for a small group of the same type
an ecological niche 生态龛
(HOLLOW)
（尤指用来放置塑像的）壁龛
a hollow in a wall, especially one made to put a statue (= artistic object) in so that it can be seen