After lunch, she watched, listened and coaxed Bobby into talking about himself.吃过午饭，她照看着博比，听他说话，哄他说说自己的事。"That's right!" Bobby exclaimed in wonder. "How did you remember that?"“对呀！”博比惊奇地叫道。“你是怎么想起那件事的？”The superb se...
穹丘的 横断面 为圆形或卵圆形.The domes are circular or ovoid in cross - section .桥面横断面可能由于过量的升力而发生扭转.The cross section of a bridge deck may twist as a result of excessive life.如将显微镜载物台旋转,便能从纤维横断面中看到第三层胞壁.A third layer transverse cell...