U-1：under one's very eyes 亲眼所见
A:I heard several people were killed in the car accident.
A：我听说那场车祸中死了好几个人。
B:Twelve, to be exact.
B：确切地说，是十二个。
A:How do you know it so clearly?
A：你怎么知道得这么清楚？
B:I was walking along the road that day. So it happened under my very eyes.
B：那天，我正好在街上，所以碰巧都看见了。
