Common sense says that if you add a fourth city to your telephone network, the total length of your cable will have to increase.

根据常识，如果要在电话网络中加上第四个城市，那么电话线的长度就必将增加。

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Note that this is an LCS, rather than the LCS, because other common subsequences of the same length might exist.

请注意，这仅是 一个LCS，而不是 唯一的LCS，因为可能存在其他长度相同的公共子序列。

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Americans are worse than many at overcoming common optical illusions about the length of lines.

和大多人比起来美国人在克服关于线段长度的常见视觉错觉上表现糟糕。

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Shoulder-length headscarves, common elsewhere in the Arab world, were seldom seen in Iraq except on Palestinian women (so they were called Palestinian veils).

ECONOMIST: Iraq rediscovers religion