just in case
她在这里是以防万一
She’s here just in case.
— 隐藏摄像机 (2005)
写“犹太人”,以防万一
Write “Jewish people,” just in case.
— 伯纳德行动 (2007)
不过以防万一嘛
But just in case.
— 月升王国 (2012)
不要拿走螺母,以防万一
Don't remove the nut, just in case.
— 潜行者 (1979)