对于任何给定对象，这些条件通常很少为真。
Often, these conditions are rarely true for any given object.
人们很少让10美元的钞票掉到地上，就算真掉了，也很快有人捡走。
People rarely drop $10 bills and when they do the money is quickly picked up.
我的邻居挣钱很少，不足以真饱肚子。
My neighbour earns very little money and can hardly keep the Wolf from the door.
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