n. an arctic atmospheric condition with clouds over snow produce a uniform whiteness and objects are difficult to see; occurs when the light reflected off the snow equals the light coming through the clouds
v. cover up with a liquid correction fluid
v. lose daylight visibility in heavy fog, snow, or rain
n. 临时性失明（因暴露于恶劣环境而引起的）；乳白天空（极地的一种大气光象）