hel.ot.ism

n.（名詞）
A system under which a nominally free social class or a religious, national, or racial minority is permanently oppressed and degraded.
農(nóng)奴制，奴隸制：一種制度，在這種制度中，名義自由的社會階級、少數(shù)宗教派、少數(shù)民族或少數(shù)種族受到永恒的壓迫和羞辱
A type of symbiosis, as among certain ants, in which one species is dominant and makes the members of another species perform the tasks required for their mutual survival.
共生（現(xiàn)象），役生現(xiàn)象：一種共生（現(xiàn)象），如某些螞蟻，在這種現(xiàn)象中，一個種處于支配地位，并使得別的種的成員承擔(dān)他們共同生存所需完成的任務(wù)