关于涂鸦是艺术行为还是一种蓄意破坏行为的争辩仍在继续。

The debate over whether graffiti is art or deliberate damage is still going on.

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然而，以医学或道德为依据争辩这种行为是否可取是不可能的。

But it is impossible to argue on medical or ethical grounds that such behaviour is acceptable.

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霍华德先生争辩道他不能为现已去世的人的行为买单(此政策始于1869，持续至1969)。

Mr Howard argued that he could not take responsibility for the actions of people now dead (the policy, started in 1869, lasted until 1969).

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