Hold a knife in your hand and hold the right mouse button to aim any pedestrian. A red marker will be created on your target.
While you are aiming and using knife, press left mouse button to assassinate your target instantly, no matter where you are.
You can aim at a long distance even through walls.

拿小刀按右键瞄准，能瞄得很远，目标头上会出现红箭头，点左键就瞬移过去将其暗杀。不用事先瞄准也行，双键只要齐按一下就逮谁杀谁，不停地双键齐按，不一会儿路上就没有行人了。