Also you want to ask does the causal relation make sense or could it be accidental?
并且你想问因果关系是否有道理，或者只是意外？
For example, can you say for certain that treatment a is better than the control treatment, or could it just be due to chance?
例如，你能确凿地说A处理水平比控制水平好吗，还是这只是偶然？
Should the re-incorporation of carbon into plant material happen where the carbon was emitted originally, or could it be ‘exported’ from one country to another?
源地释放的碳能够被另一个地方的植物固定吸收吗，或者说碳可以从一个国家“出口”到另一个国家吗？
Is this aspirin regimen recommended only for women who have had breast cancer, or could it be a preventative measure for women at high risk also?
是仅对乳腺癌妇女推荐采用阿司匹林疗法，还是对高风险妇女也可以采取的预防性措施？
或者也有这可能？
Or could it be one of your neighbors?
还是你的一个邻居写的？
Or could it have come there since last night.
要不，这字是不是昨天晚上才出现的？
还是有可能？
还是有可能？
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