jack-in-the-box 是什么意思

名词复数:jacks-in-the-box

	n. (pl jack-in-the-boxes, jacks-in-the-box) 1.(打开盖子即有玩偶跳起的)玩偶匣。 2.(能放出多种玩意的)盒子焰火。 3.【机械工程】差动齿轮[装置]。

plaything consisting of a toy clown that jumps out of a box when the lid is opened

Thomas mugridge popped out of his galley like a jack-in-the-box .
汤玛斯茂格立治从厨房里一跃而出，象是装在盒子里的弹簧人一般。

jack-in-the-box是什么意思