请问这句话是什么意思？How do you relate requirements and quality versus testing in a data warehouse environment.//bow~

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1. if作为“是否”的用法初二课本暂时没有涉及，只作拓展之用。
2. 以下内容只作了解，现行牛津初中教材内容已经删除。
在表示某一情形总会出现相同的结果时，if从句和主句都用一般现在时。
If the engine gets too hot, it starts to smoke. 发动机过热就会开始冒烟。
3. if在虚拟语气中的用法为高中内容，比较复杂，在此不作涉及。

◇课本例句
1. If you eat my food, I won’t talk to you. (P58)
2. If I don’t have food, I will die. (P58)
3. If I don’t have food, I will die too. If I die, no one will look after you. (P58)
4. If hunters catch a giant panda, they will kill it for its fur. (P60)
5. If farmers cut down trees and forests, giant pandas will have nowhere to live. (P60)
6. If people find baby pandas alone, they will often take them away. (P60)
7. If we do nothing, soon there will be no giant pandas in the world! (P60)