缘分，有缘，凑巧，怎么用英语表达serendipity

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serendipity
ser·en·dip·ity  / ˌserənˈdipəti / noun [U]
   the fact of sth interesting or pleasant happening by chance
   巧事；机缘凑巧
• ser·en·dip·it·ous  / -ˈdipətəs / adj.:
   serendipitous discoveries
   偶然的幸运发现

when interesting or valuable discoveries are made by accident
• 〔有趣或有价值的事物的〕碰巧发现，机缘凑巧;


luck that takes the form of finding valuable or pleasant things that are not looked for
   They found each other by pure serendipity.


noun [mass noun] the occurrence and development of events by chance in a happy or beneficial way

    a fortunate stroke of serendipity
    [count noun] a series of small serendipities

DERIVATIVES
serendipitous adjective serendipitously adverb
ORIGIN
1754: coined by Horace Walpole, suggested by The Three Princes of Serendip, the title of a fairy tale in which the heroes ‘were always making discoveries, by accidents and sagacity, of things they were not in quest of’