常見(jiàn)例句用作名詞 (n.)A war came knocking on your door.一個(gè)戰(zhàn)爭(zhēng)受到在你的門上爆震音的影響。(vbl.)They found that knocking out the gene in fetal mice whose hematopoietic systems had already formed caused hematopoietic stem cells to disappear.他們發(fā)現(xiàn)擊昏已經(jīng)形成造血系統(tǒng)的胚胎小鼠的基因會(huì)引起造血干細(xì)胞的消失。 返回 knocking