照明辐射的照度通常是以光度为单位.Illuminance of illuminating radiation is always measured in photometric units.当照度低于约1勒克司时,锥状细胞就不再起作用.When the lighting level falls below about 1 lux the cones cease to act.规定的被照明表面上的照度平均值.It refers to th...
a casual and conversational tone不拘礼节的谈话语气I was wrong about it being a casual meeting.我误以为这是个非正式会议。Every movement, no matter how casual and spontaneous, needs to be worked out to the last detail...对每一个动作，无论它显得多么随意和无意识，都不能...