accumulated是什麽意思

[英][?kju:mj?le?t][美][?kjumj?let]

vt.& vi.堆積，積累;

vi.（數量）逐漸增加，（質量）漸漸提高;

過去式：accumulated

過去分詞：accumulated

How the hell did pure oxygen accumulate in the chest cavity?

純氧究竟怎樣在胸腔裏累積？