B. Extensive reading: We must train our ability to scan, skip and read fast. Namely, the ability to catch the key words, the topic sentences and the drift of the articles.

泛读：要培养浏览，跳读和快读的能力。即抓住关键词，主题句和中心大意的能力。

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Minimizing the genetic drift in fertility was key to the purification and reproduction of thermo photo sensitive genic male sterile (TPSGMS) lines of wheat.

最大限度控制育性的遗传漂移，是小麦温光敏核不育系提纯中要解决的主要问题。

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Then, some key problems are analyzed, such as the tracking method, GPS static drift, cloud terrance camera control and so on. Design scheme is introduced at last.

对跟踪方法、GPS静态漂移、云台镜头控制等关键问题进行了分析，给出了设计方案。

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The Archbishop said no-one had all the answers to dealing with the crisis, but a key move to rebuild confidence would be making sure people could no longer "drift" into senior banking positions.

BBC: Archbishop's warning over economic 'depression'

Today Labour leader Ed Miliband will make a key speech to Labour's National Policy Forum amid murmurings that he has allowed the party to drift since he took up the leadership two months ago.

BBC: Hain: Public had lost faith in New Labour project