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单词
snow-covered days
释义
snow-covered days
Encyclopedia
农学
积雪日数
释
snow-covered days
积雪日数
对于积雪日的定义,在中国积雪研究中存在两种标准,第一种是根据天气现象来定义,即当观测场上视野范围内一半以上被积雪覆盖时,就记为积雪日;第二种是根据积雪深度来定义,即当积雪面积达到观测要求,且其深度达到规定深度(例如0.5厘米以上深度的积雪)时,记为积雪日。
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mass metrology
mass moment
mass moment control
mass moment of inertia
mass motion
mass movement
mass nucleon transfer
mass number
mass-number conservation
mass of a chain
mass of a current
mass of an r-vector
mass of a polyhedral chain
mass of a unitary representation
mass of data
mass of substance
mass of the atom
mass of the electron
mass of the neutron
mass of the nucleus
mass of the proton
mass of π-meson
Masson's model
Masson's pine,horsetail pine
mass operator
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