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美洲黑杨
释义
美洲黑杨
Encyclopedia
农学
〔用材树种〕
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eastern cottonwood
美洲黑杨
双子叶植物纲金虎尾目杨柳科杨属一种植物。又称东方三角叶杨。
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constant matrix
constant mineral elements
constant motion
constant multiplier
constant number
constant of aberration
constant of apsidal motion
constant of gravitation
constant of integral
constant of integration
constant of motion
constant of nutation
constant of precession
constant of proportionality
constant of refraction
constant of structure
constant path
constant permeability alloy
constant polynomial
constant-potential accelerator
constant potential coulometry
constant precession curve
constant pressure boundary
constant pressure calorimeter
constant pressure control method
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