1.stumble v. 绊脚；跌跌撞撞地走；踉跄；步履蹒跚

例句：If your timing is right, you may be fortunate enough to stumble across a village fiesta.
如果你时机把握得好，你会幸运地撞上某个乡村节日M-6G0v0K0#iIv。

2.bolster v. 支持；支撑；鼓励；援助

例句：His recreation of the city is credible, with a substratum of fact to bolster the fiction.
他对该城历史的再现是可信的，虚构的小说情节隐念着一些事实作为支撑h@#rbOAT*o^Y@0。