knocking

n.

爆震音，卡答卡答的故障声音；

v.

敲，击，打( knock的现在分词 )；（心）怦怦跳；把…撞击成（某种状态）；批评

knocking out原子位移；击出

knocking over脱圈

1. A war came knocking on your door.
   一个战争受到在你的门上爆震音的影响。

1. They found that knocking out the gene in fetal mice whose hematopoietic systems had already formed caused hematopoietic stem cells to disappear.
   他们发现击昏已经形成造血系统的胚胎小鼠的基因会引起造血干细胞的消失。

Knocking down barriers: advances in siRNA delivery.
Knocking on new physics’ door with a scalar resonance
Knocking on the heaven’s wall: pathogenesis of and resistance to biotrophic fungi at the cell wall
Women in the Legislatures and Executives of the World: Knocking at the Highest Glass Ceiling
Novel swine-origin influenza A virus in humans: another pandemic knocking at the door.
Whitehead, K.A., Langer, R. & Anderson, D.G. Knocking down barriers: advances in siRNA delivery. Nat. Rev. 8, 129-138
Whitehead, KA, Langer, R and Anderson, DG. Knocking down barriers: advances in siRNA delivery. Nat Rev Drug Discov 8: 129-138
Extended longevity of Caenorhabditis elegans by knocking in extra copies of hsp70F, a homolog of mot‐2 (mortalin)/mthsp70/Grp75
Cutting Edge: Absence of Expression of RAG1 in Peritoneal B-1 Cells Detected by Knocking into RAG1 Locus with Green Fluorescent Prot...
A synergistic effect on the production of S -adenosyl- l -methionine in Pichia pastoris by knocking in of S -adenosyl- l -methionin...