Air permeabilities of four kinds of wood chip aggregates of different species such as poplar, birch, basswood and elm were experimentally studied.是什么意思_Air permeabilities of four kinds of wood chip aggregates of different species such as poplar, birch, basswood and elm were experimentally studied.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句