麦凯是在BBC的一个录音室里第一次看到这个效果的：那位正在播音的职员被平行线柱上线条空白间上下跳动的阴影错觉搞得很不耐烦。

MacKay first observed this effect on the wallboard of a BBC studio: the broadcasting staff had been annoyed by illusory shadows running up and down blank strips between columns of parallel lines.

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巴基斯坦的线人获得的信息也会传递给我们，”凯勒说。

The Pakistanis had their guys and would pass on information, " Keller said.

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从弗里敦到凯内马需要5个小时，而从边境线到达蒙罗维亚仅需2个小时。

One can reach Kenema in five hours from Freetown, and drive from the border to Monrovia in two.

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