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一个多世纪以前,美国画家莫尔在法国接到了一封紧急家信,要他立即赶回美国去。这封急信已经在路上走了一个月,他迅速地买了一张返程的船票,而船却又要在海上航行一个月才能抵达美国,急得这位画家团团转。他立即奔回自己的舱房,记下了这么一段话:“电流可以突然接通,也
More than a century ago, American painter Molle received an urgent letter in France asking him to immediately return to the United States. The urgent letter was already on the road for a month. He promptly bought a return ferry ticket, but the ship sailed for another month at sea before arriving in the United States. He immediately rushed back to his cabin, noted the following passage: "The current can suddenly turn on, too