spring into action 采取行动
spring up 突然出现
spring to mind 突然想到
A: Why did he jump so suddenly?
A：他为什么跳得那么突然？
B: He sprang up when he heard the loud noise.
B：他听到巨大的响声时猛地跳了起来。
1) 突然跳跃
2) 突然出现
3) 猛地移动
1. 跳跃，跳起
verb
1. To move or jump suddenly upward or forward.
Synonym: leap, jump, bound