Fear of predators doesn't just affect the penguins' daily activities, however. It also influences the birds' migration patterns, Ainley and Ballard report this week in Polar Biology.

Ainley和Ballard在本周的《极地生物学》中指出，害怕被捕食已经影响到企鹅的日常活动，甚至它们的迁徙规律。

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Carbazoles are polar compounds in oils, and they are useful indicators for study of hydrocarbon migration.

咔唑类化合物是原油中极性较大的化合物，是研究油气运移的有效指标。

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Then three spotlight mode SAR imaging algorithms are discussed and compared, including polar format (PF) algorithm, chirp scaling (CS) algorithm and range migration (rm) algorithm.

然后重点对三种聚束式SAR成像算法进行了讨论与比较，包括极坐标格式(PF)算法、线性调频测绘(CS)算法和距离走动(RM)算法。

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The reports from the Nenets are independently confirmed by groups of herders on both sides of the Polar Urals, travelling along traditional migration routes used for decades.

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