spring up 突然出现
spring from 源于
well-sprung 弹力好的
A: Did you see that cat? It has suddenly sprung onto the table!
A：你看到那只猫了吗？它突然跳到桌子上了！
B: Yes! I was so surprised by its sudden movement.
B：是的！它的突然动作吓了我一跳。
1) spring 的过去分词
2) 突然跳出或出现的状态
3) 触发或释放（如陷阱或机械装置）
1. 跳出；蹦出；突然出现
verb (past participle of spring)
1. To move or jump suddenly upward or forward.
2. To appear or develop suddenly.
Synonym: jumped, leapt