依照这一名为断裂-融合- 桥循环 （ breakage-fusion-bridge cycle ）的假说，由细胞有丝分裂时的染色体融合、断裂 所造成的位于融合染色体末端的DNA 重复应该是两个方向相反的重复序列。
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STP是为了防止桥循环通过允许网络交换机或港口之间只有一个路径。
STP was created to prevent bridge loops by allowing only one path between network switches or ports.
介绍了使用泥浆护壁气举反循环回转钻进工艺进行襄樊汉江四桥大口径嵌岩桩的施工实践。
The paper introduced the use of airlifting reverse circulation rotary drilling techniques in practice of major diameter socket pile operation at Xiangfan city's Hanjiang No.
是可以循环再用的，在北美洲，三分之一的锌是从旧汽车，桥及建筑物中循环而得来的。
Zinc is recyclable. Over one-third of the zinc consumed in North America is recovered from old cars, bridges and buildings, among other sources.
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