the plant ended up small.

中文意思：工廠最終變小了

這家工廠最後很小

small在句中應該是狀語成語成分，表示工廠最終變小的狀態。

ended up

英[ˈendɪd ʌp]

美[ˈendɪd ʌp]

結束，終止，入選

例句

Davies is a striker of limited natural talent and yet he's ended up playing for England and has made an excellent career for himself.

戴維斯是那種沒什麼天賦的射手，但他曾入選國家隊。職業生涯也堪稱壯麗。