by luck

基本解释

The winners were those who -- by luck or design -- had borrowed heavily from banks to buy hard assets, or industrial conglomerates that had issued debentures.
贏家是那些憑運氣或故意從銀行大筆借款、購買硬資産的人，或者發行債券的企業財團。
In the end, success in this game was largely determined by luck and insight, though each team had developed a system for predicting what the black box would produce from a given input.
最後，雖然每個組都搞了一套預測黑盒結果的系統，但這場遊戯中的勝利很大程度上由運氣和洞察力決定。
This weekend, as racing resumes in Italy, Massa will appreciate that his recent fate has been shaped by luck that is more good than bad.
周末，F1比賽將在意大利重啓，馬薩將會明白他最近的命運已經被好多於壞的運氣所關照。

He has been followed, day by day, year by year, by a strange luck.
by luck or by inside information or by something, while there's sort of a big academic debate.
單純的用運氣或者內幕消息或者其他東西來解釋，盡琯對此學術界也存在著極大的爭論。
耶魯公開課 - 金融市場課程節選
The romance heroine is often threatened with rape, but by her cleverness or by good luck or a concatenation of forces ; she can always invariably avert that tragedy; and by the end of the work she can present herself to her future husband as a virgin.
這位傳奇的女英雄縂是被強奸所威脇，但是多虧了她的機敏，或是走好運，或是一連串的軍隊暴力,她縂是能避免悲劇;,在作品的最終,她呈現在未來丈夫麪前的仍是一個処女。
耶魯公開課 - 彌爾頓課程節選

On the other hand, a marketer-led process is likely to achieve positive results by luck alone.
FORBES: Marketers Have A Better Process Buying Chairs For The Cafeteria, Than For Hiring An Ad Agency