单词	okta
释义	okta /ˈɒktə / noun (plural same or oktas) Meteorology A unit used in expressing the extent of cloud cover, equal to one eighth of the sky.The amount of sky covered is typically measured in oktas, eighths of sky cover, a non-linear scale.... Overcast skies (typically 7-8 okta of stratus) reduced exposures by a mean of 54%. It was 0.2 + / 0.06 (54% of clear sky conditions) for activities in which cloud cover was measured at 7 okta or greater. Origin 1950s: alteration of octa-.
随便看	focal focalise focalization focalize focal length focally focal plane non-national non-native non-natural non-naturalism non-naturalist non-naturalistic non-naturalistically non-naturalness non-necessary non-necessity non-negative non-negotiable non-net non-Newtonian non nobis non-nocturnal non-normal non-normality

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