他赶紧捂住嘴,不让自己笑出声来。His hand shot to his mouth to stifle a giggle.她深深地叹了一口气,用手捂住了自己的脸。She sighed deeply and covered her face with her hands.他手捂住嘴向浴室冲去。Hand clamped over his mouth, he made a dash for the bathroom....
Chinese herbal medicines have Notopterygium, Gentiana, such as rhubarb.中药材有羌活 、 秦艽 、 大黄等.In recent years, Gentiana spot blight is the most important disease of Chinese herbal medicines gentian.龙胆草斑枯病是近几年中药材龙胆草的最主要病害.Chin...
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...