边材含有木质导管, 但不如中心木质那样坚硬.Sapwood contains xylem vessels, but not as strong as heartwood.毛白杨边材材色株间存在显著差异.Thecolor of sapwood of Chinese white poplar among trees has significant difference.边材色稍浅,仅导管槽带有红色.Sapwood pale colored ...
An iteration procedure can be used to determine the eigenvalue.迭代方法可用来确定特征值.To this end we shall first consider the following eigenvalue problem.为此目的,我们将首先考虑下列的本征值问题.We can not say for certain which eigenvalue will be ob...
They had asked Hong Kong for permission to put into port there.他们请求香港允许他们在那里入港停留。The 1950s were the decade of Hong Kong's industrial take-off.20世纪50年代是香港工业开始快速发展的10年。The Regent hotel has a superlative view of Hong K...