直到19世纪,那不勒斯的面包师拉法尔卡·埃斯波西托才开始销售第一批现代披萨。
It was the nineteenth century before Rafacla Esposito, a baker from Naples, began to sell the first modern pizzas.
在历次危机中,波创作了许多故事和诗歌,并在不同的出版物上发表;但直到1845年他的诗歌《乌鸦》出版后,他才成名。
Through all his crises, Poe produced many stories and poems which appeared in different publications, yet he didn't become famous until 1845, when his poem, The Raven, was published.
在爆炸发生后约40秒冲击波才到达我这里。
About 40 seconds after the explosion the air blast reached me.
But for now let's simply say that we have a diffraction which we know occurs only by wave-like behavior and it involves the use of x-rays. Why x-rays?
但现在让我们来简单假设一下,我们知道,只波才发生衍射,而且衍射涉及了X光的使用,为什么是X光?
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