他推测是因为石油里含有铁才呈现橙色，但要等到实验室对石油进行分析之后才能知道结果。

He speculated that the oil may glow orange because of iron content, but the answer will have to wait until after the oil is analyzed in a lab.

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实验结果表明：对于含有目标信息的起伏背景图像，背景对消的最佳滤波方法，应采用开余滤波法。

Then, the experiment results show that in all of four filtering methods, the open residue filtering method is the best for background drop.

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实验结果显示，由于处理后纤维的结构中含有高吸水性的羧甲基基团，处理后的纤维比初始纤维有更高的吸湿性。

Experimental results showed that the treated fibers had much higher hydroscopicity than the untreated ones, due to the highly absorbent carboxymethyl groups in the fiber structure.

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