Some of the components he designs are like "variable springs", he explains – motion-controlling parts able to go into reverse and soak up some impact from the ground below, say. "It can dynamically absorb load as you need it to."
先理解原理：看动图 + 手动模拟小数组。Line官方版本下载对此有专业解读
sciencedirect.com，更多细节参见im钱包官方下载
class DatabaseStorage {