Some viruses are benign or playful in intent and effect (" happy birthday, Ludwig! ") and some can be quite harmful, erasing data or causing your hard disk to require reformatting.

有些病毒是良性的，或活泼，在意图和效果(“生日快乐，路德维希！”)有的可能是相当有害的，擦除数据，或导致您的硬盘，要求改组。

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He was very anxious to see the effect of the birthday letter, telling his mother about the thousand pounds.

他特别急于知道，告诉母亲一千英镑的生日贺信产生的效果。

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"Happy Birthday" would have a radically different effect if the bar contained only a handful of grumpy drinkers who were scattered randomly about the stage.

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For some time now, the U.S. has, in effect, been drawing crappy, smiley-face birthday cards and calling them wonderful.

NEWYORKER: America��s Top Parent

Vatican officials said that Cardinal O'Brien's resignation was linked to the fact that he was approaching his 75th birthday and the Pope was keen to accept resignations and get business going ahead of his own resignation taking effect.

BBC: Pope Benedict XVI amends Roman Catholic conclave law