basal joint 中文意思是什麼
basal joint
解釋
底面節理-
The diffusion welding behavior of single - crystalline cu to single - crystalline - aio with a nb film interlayer and the joint microstructure properties were studied by tem, sem / eds analyses and four - point bend testing. the nb film interlayer deposited by electron beam evaporation on the ceramic side prior to diffusion welding was found to be olycrytalline and fiber - textured after diffusion bonding, with the close - packed plane ( 110 ) being parallel to the ( 0001 ) basal plane of - aio
擴散連接技術是一門邊緣科學，涉及材料、擴散、相變、界面反應、接頭應力應變等各種行為，工藝參數多，雖然已經進行了大量的試驗研究，但卻對各種材料的連接機理尚未有明確的認識，為此人們試圖藉助于計算技術，對接頭行為進行數值模擬，以便找到共同規律，對擴散連接過程及質量進行預測與實時控制。 -
The origin and evolution of land plants was an important event in the history of earth life and has affected all other lives on the earth and global environment. during the past two decade, the new discoveries of fossil plants microfossils and megafossils from the mid - ordovician through all silurian to the lower devonian improved knowledge of the origin of land plants, provided a time framework of the basal groups for the land plants and the early evolution diversity of vascular plants. three new plant based epochs have been recognized. on the other hand, molecular sequence studies have provided insights into the phylogeny and early branches of land plants. a phylogenetic tree has been established by the joint of a study of comparative morphology and gene sequences. this paper summarizes recent advances and new knowledges, comments on the phylogenetic studies based on the cladistic analysis
陸生植物的起源和演化是地球生命中的重大事件，它影響到地球上所有的其他生命和全球環境。在過去的20年中，從中奧陶世歷經整個志留紀至早泥盆世的巖層中，化石植物微化石和大化石的新發現改變了人們對陸生植物起源的認識，並且為陸生植物和維管植物早期演化分異提供了基部類群分化的時間框架。據此人們識別出地史中的3個陸生植物的時代：始胚植物時代始維管植物時代和真維管植物時代。 -
It not only provides the basal life security to the astronauts, but also has high joint mobility index, so the astronauts can fulfill all kinds of extravehicular activities with it
艙外航天服除了為宇航員提供基本的生命保障外，還應具有高的活動性能，從而使宇航員能夠有效地完成各種艙外作業。
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