Where water is available, when and in what condition matters hugely.
水资源在何处，何时，何种条件下可用非常重要。
On what condition can I go out?
什么条件下我才能出去？
Under what condition do your eyes water?
眼睛在什么情况下流泪?。
On what condition will you agree with me?
什么条件下，你才能同意我？
On what condition will you agree with me?
什么条件下，你才能同意我？
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