If the feasible region was empty, the interval vector can be excluded.

若可行域为空，则可排除该区间向量。

youdao

Nevertheless, more than 21.6 million children of lower secondary school age remain excluded from education across the region and many will never even spend a day in school.

UNESCO: World Water Assessment Programme (WWAP)

Mr. RUPP: Well, east up by the Red Sea is perhaps the poorest region of Sudan, and there is a feeling that at least some of the tribes in that area have been excluded from discussions, and the concern on the part, I think, of the Sudanese government as well as others of us that there--that could be a next area of conflict.

NPR: U.N.'s Annan Hears Sudan Refugees' Stories