Police asked passers-by if they had seen the accident.

警察询问过路的人是否目击了这次事故。

《牛津词典》

They had seen him trawling and therefore knew that there were fish.

他们看见他正用拖网捕鱼，因此他们知道那里有鱼。

《柯林斯英汉双解大词典》

They had seen her hurrying away, so they thought that she had been glad to go.

他们看见她匆匆离去，所以他们认为她离开的时候很高兴。

youdao

They were not musicians, but they had seen people whose music they thought should be documented.

VOA: special.2010.04.19

All you guys, there's a huge number of hands who said they had seen it before.

所有人,之前有很多人都说见过这个

耶鲁公开课 - 博弈论课程节选

At the end of the semester he then asked people to rate different pictures as to how much they liked them, and even though people had no memory of seeing one or--versus the other they tend to like the pictures more that they had seen before.

在学期末，他叫同学,按自己喜欢程度，给这些图片评分，虽然同学都不记得哪些看过，哪些没看过,但他们喜欢的图片往往是,他们之前看过的图片。

耶鲁公开课 - 心理学导论课程节选

The movie introduced audiences to a 3-D world unlike anything they had seen before.

NPR: Making an Animated Escape to 'Madagascar'

One caller said they had seen her on a ferry from Portsmouth to Bilbao in Spain.

BBC: Milly Dowler murder: Surrey Police say mistakes made

It was the first time they had seen their grandchildren, but Leili couldn't go with them.

NPR: Israel Limits West Bank Residency Permits