by a stroke of luck

基本解釋

But Napoleon, by a stroke of luck, was able to build two new bridges.
僥幸的是，拿破侖居然突擊造起兩座橋。
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By a stroke of luck, Ayn (it rhymes with"mine") encountered legendary director Cecil B. DeMille on her secondday in town.
矇幸運女神的垂青，艾茵（押韻詞語“mine”）在來到鎮(zhèn)上的第二天就遇到了傳奇導縯塞西爾·德米爾。
But Napoleon, by a stroke of luck, was able to build two new bridges. Thousands of French soldiers escaped, but at the cost of fifty thousand dead.
僥幸的是，拿破侖居然突擊造起兩座橋，成千上萬法國士兵得以逃脫，但卻損失了5萬人。