常見例句用作名詞 (n.)A war came knocking on your door.一個戰(zhàn)爭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引起造血乾細胞的消失。 返回 knocking