| 1. | A word boundary is the position between a word and a space
字边界是单词和空格之间的位置。 |
| 2. | In the word chapter because it appears before a word boundary
，因为它出现在字边界的前面： |
| 3. | But on a word boundary in the word
中的非字边界处，但出现在单词 |
| 4. | Because the characters appear following a word boundary
的开头三个字符，因为这三个字符出现字边界后面： |
| 5. | The word boundary metacharacters ensure that only whole words are detected
字边界元字符确保只检测整个单词。 |
| 6. | Denotes a word boundary between
表示单词边界（在 |
| 7. | Matches a word boundary , that is , the position between a word and a space
匹配一个字边界，即字与空格间的位置。 |
| 8. | Sentence and word boundaries
句子和词边界 |
| 9. | To verify that the second match is on a word boundary , add the metacharacter
为验证上述第二种匹配是以单词为边界的，可以将元字符 |
| 10. | Detect word boundaries more accurately by treating punctuation characters as parts of words
检测单词边界时把标点视为单词的一部分 |
