本文是关于针叶树木材弹性特性研究的理论分析。
Theoretic analysis for elastic modulus of softwood was carried out in this paper.
他和工厂的合伙人大卫·休斯利用佐治亚盛产的杨树木和甜橡胶树制造筷子。这类木材弹性好而有韧性。
He and his co-owner, David Hughes, make their chopsticks from poplar and sweet-gum trees, which have the requisite flexibility and toughness, and are abundant throughout Georgia.
声能通过空气、水、木材、钢材和任何其他弹性材料。
Sound will travel through air, water, wood, steel or any other elastic material.
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