urchin 核心词议：
n. 顽童，淘气鬼；海胆；刺猬
urchin 基本解释
速记方法
速记技巧
词源记忆法
来自拉丁语ericius，刺猬，来自PIE*ghers，刺，刺毛，词源同horror.
知识扩展
urchin 变化形式
复数： urchins
中文词源：
urchin 海胆，流浪儿
来自拉丁语ericius,刺猬，来自PIE*ghers,刺，刺毛，词源同horror.
urchin
精选例句
1、 They say he is a mischief-maker,a tramp,a street urchin—Calumnies!
他们说他是个捣蛋鬼，是个流浪汉，是个街头顽童—诋毁!
常见考点例句：
- To learn how urchin teeth stay sharp despite all that grinding , researchers analyzed the roughly 0.1-inch-long ( 3-millimeter-long ) choppers of the california purple sea urchin .
- 为了了解为什么海胆的牙齿不停地打磨岩石却不会变钝，研究人员对加利福尼亚紫海胆大约0.1英寸（3毫米）长的牙齿进行了分析。
- Still , somehow , the negro and the urchin held him in a greater terror .
- 不过，不知为何，黑人和顽童们却更加畏惧他。
- It grows like a sea urchin : long spines of ability radiate out towards specific needs and desires .
- 科技的发展就如海胆：能力像长长的脊椎一样向特定需求呈放射状。
- Only three parts per million can kill sea urchin embryos , for example .
- 举例来说，仅仅百万分之三就能杀死海胆晶胚。
- Adam was violent , and his cries and curses , his hard and brutal manner were the terror of the negro who passed at night that way , or the urchin overtaken by darkness on his road home .
- 亚当的内心充满暴力，他的漫天咒骂，他的冷酷无情，让夜晚走过那条路的黑人或是赶着夜路回家的顽童不寒而栗。