v.  跳跃，跳跃着前进，蹦蹦跳跳地跑

n.  bounds  界限，限度，极限，限制范围

• boundary

  n.  分界线；边界

  n.  限度，界限，极限

• boundless    a. 无限的，无量的，无穷的

• be bound to  很有可能，肯定会

• be bound (by sth) law/agreement 

  受（某事物）约束

• be/feel bound to do sth 

  有义务做某事，有责任做某事

• be bounded by sth  以某物为界

• out of bounds  不得进入

• by leaps and bounds/in leaps and bounds  突飞猛进，飞速发展

• national boundaries  国界

• This is your chance to convey boundless enthusiasm for the subject.

  对学科的无限热情

• It is bound to gain support from the local people. 很可能会得到当地人的支持

• It (misnaming) hardly occurs across gender boundaries. 打破性别的界限

• It hardly occurs across gender boundaries. 打破性别的界限

• The Foundation is bound by the treaty to help any nation that requests aid.

  根据条约规定，这个基金会应为任何请求援助的国家提供帮助。

• A son is duty bound to look after his mother. 儿子照顾母亲是义不容辞的。

• Julie’s reading is improving in leaps and bounds. 朱莉的阅读能力提高得很快。

• Scientists continue to push back the boundaries of human knowledge.

  科学家不断扩大人类知识的范围。