This colossal beam is a yard; that great column of wood which stretches out on the earth as far as the eye can reach is the main-mast.
那条巨梁是一根挂帆的横杠,那根倒在地上长到望不见末梢的柱子,是一根大桅杆。
The earth pressure is calculated by using Rankin theory or Column theory.
通常采用朗金理论或库仑理论计算作用在挡土墙上的土压力。
Rare earth elements (REE), trace elements and forming environment of basic dykes and basalt share similar characteristics with plate basalts and typical basalt formed by mantle column.
基性岩墙和玄武岩的稀土元素、微量元素、形成环境等均与板内玄武岩或典型的地幔柱成因玄武岩具有相似的特点。
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