Close-ups such as this photo of a crab spider capturing a small bee are even easier with a digital camera; you can check an image on the LCD panel to be sure you get what you want.
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在图片中，这些特征有的画得较窄，有的画得较宽。研究人员训练蜜蜂对这些图片进行区别。
The bees were trained to distinguish between an image with narrower features and one with wider ones.
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