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二氧化碳在许多方面类似于氮气，但如果它与石灰水混合，它就使清澈的液体变成乳状液，而氮气不能，由此可以鉴别热氧化碳。
Carbon dioxide is like nitrogen in many ways, but if it is mixed with limewater, it causes the clear liquid to because milky, while nitrogen dose not. This is the test for carbon dioxide.
由于井下液体的折射率变化很大，我们就可以根据其数值来鉴别不同液体的种类。
Since downhole fluids have different refractive index values of we can differentiate the distinct fluids with this methodology.
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