| 1. | The borderline between informal language and slang is hard to define . |
| 口语和俚语之间的分界线是很难确定的。
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| 2. | It's hard to define exactly what has changed. |
| 很难解释清楚到底发生了什么变化。
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| 3. | Definitions should not be more difficult to understand than the words they define . |
| 词语的定义不应比所解释的词语更难理解。
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| 4. | I went there every morning, but I could not exactly define why. |
| 我每天早晨都到那儿去，但是我不能确切说明为什么。
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| 5. | I cannot define precisely what that " something " is. |
| 我不能确切解释那个“某物”是什么。
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| 6. | define [fix, set] boundaries |
| 确定边界线
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| 7. | adjectives define [limit] |
| 形容词限定(…的释义)
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| 8. | define the area of work |
| 规定工作范围
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| 9. | define sb.'s powers |
| 确定某人的权限
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| 10. | define a word with precision |
| 精确地给一个词下定义
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