Small freshwater crustaceans with a shield-shaped carapace.
小型淡水甲壳动物，长有盾牌状甲壳。
Any of various ferns of the genera dryopteris or polystichum or lastreopsis having somewhat shield-shaped coverings on the sori.
孢子外覆有盾形罩套的鳞毛蕨科或水龙骨科的蕨类植物。
In February, Copenhagen practice PLH Arkitekter revealed its plan for a shield-shaped visitor centre at a Viking landmark in Denmark.
今年二月，哥本哈根plh建筑事务所发表了它在丹麦维京地标的一个盾牌型游客中心的设计。
As a sophisticated tunnel lining type, the universal wedge-shaped segments can do a good job in the control of the axis of the shield-driven tunnel and the quality of the segment ring.
通用楔形管片作为一种较先进的隧道衬砌形式，在盾构法施工中能够较好地控制隧道掘进轴线和管片成环质量。
Together these deposits create a surface feature shaped like a volcanic shield – a clear sign to scientists that volcanic activity helped form the surrounding plains.
这些活动同时作用，形成火山平原，这是一个火山活动影响地质构造的重要标志。
Together these deposits create a surface feature shaped like a volcanic shield – a clear sign to scientists that volcanic activity helped form the surrounding plains.
这些活动同时作用，形成火山平原，这是一个火山活动影响地质构造的重要标志。
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