Question

【题目】大卫的成功不是偶然的，那是他艰辛努力的结果。
David's success didn't come . It was the result of his hard work.

Answer 1

【答案】by；accident／chance
【解析】对应英语与汉语部分可知需要翻译的短语是偶然的．短语的英文表达是by accident或by chance，是固定短语．所以答案是by accident或by chance。