Sign denoting that the result of an operation is close to the same value as the one on the right.
词组
≈is approximately equal to
约等于号
属类:人文学科-词典学-符号名称
For intergranular materials, poorly to moderately well cemented, the total porosity is approximately equal to the effective porosity.
对于由晶体构成的物质,其晶粒间含泥浆少或较少,因此总孔隙度与有效孔隙度近似相等。
属类:社会文化-新闻报道
A polar weather condition caused by a heavy cloud cover over the snow,in which the light coming from above is approximately equal to the light reflected from below,and which is characterized by absence of shadow,invisibility of the horizon,and discernibility of only very dark objects.