bound

n 常用复

1. 边界，界限

• within the bounds of the king 在国王的统治地界内

2. 跳跃，跳跃向前

3. (球)弹回，反跳

词组know no bounds 非正式 不知限量，无限

• When he heard that he had become a father,his happiness knew no bounds. 他得知自己当了父亲时高兴异常。

within bounds 在限度之内，在适当范围之内

• keep the expenses within bounds 把开销控制在限度之内