Even Mark Twain, a man who enjoyed a hearty laugh, said that when it came to photographic portraits there could be "nothing more damning than a silly, foolish smile fixed forever".

就连乐于开怀大笑的马克吐温也说，当谈到人像照片时，“没有什么比一个又傻又蠢的微笑被永远定格更可怕的了”。

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Ms Hearty said that even after this increase, oil home heating would still be at least 10% more expensive than gas.

BBC: NEWS | UK | Northern Ireland | Gas users face major price rise