Other experts, however, believe this temperature trend is a natural variation.
但是另外一些科学家却认为这种温度变化趁势是自然变化。
Variation trend of cumulative oil production were similar as that of recovery.
累积产油量变化趋势与采收率变化相近；
Variation trend of cumulative oil production were similar as that of recovery.
累积产油量变化趋势与采收率变化相近；
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