But while you can learn a lot on your own diving into an unknown area, your education can be greatly accelerated when you have an experienced person to check in with or to lead you.
尽管在未知的领域中，您可以通过自学的方式学到很多知识，但如果有一个经验丰富的人引导或带领您进行学习，那么将可以极大地加速学习过程。
Environmental group Greenpeace said it had taken samples which showed the presence of lead, chrome and arsenic in water in the area.
绿色和平环境组织表示，采集到的样本已表明这些地区的水域有铅、铬、砷的存在了。
If this area of the North American continent is preloaded with the stress that can lead to earthquakes, it will be difficult to assess earthquake risk in the region.
如果北美大陆该地区预先就有诱发地震的应力，将很难评估该地区的地震风险。
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