at a venture​ 中文含义：随意地，未经考虑地，碰运气地 通俗理解：没有明确计划或依据，凭直觉或运气尝试某事，就像闭着眼睛随便指一个方向。 例句： Not knowing the answer, he guessed at a venture and surprisingly got it right.​ （他不知道答案，就随便猜了一个，没想到居然猜对了。） She bought the lottery ticket at a venture, never expecting to win.​ （她随意买了张彩票，从没指望能中奖。）