springboot释义：
春天的引导
Space boot technology in athletic shoes is meant to put more spring in your step.
将太空靴的技术运用于运动鞋，等于在你的脚底上增加了弹簧。
abbr. 子系统号（Subsystem Number）；（美）社会保险号（Social Security Number）；智力严重逊常（Severely Subnormal）
例句：
Two more persistent fields are defined, SSN and BALANCE.
