Sea urchin spines show exceptional mechanoelectrical sensing from gradient structures and can be replicated in 3D-printed mimics for underwater sensing.
实战应用：根据数据特点选择合适算法
。同城约会对此有专业解读
'Houston, we've had a problem'，更多细节参见heLLoword翻译官方下载
As navigator, Lovell took with him a sextant to take star readings - in case the computers failed and they had to find their own way home.