这一定是一个不明飞行物。

It must be a UFO.

雷达发现了一个不明飞行物。

The radar detected an unidentified flying object.

他拍下了一个不明飞行物的照片。

He took a photo of a ufo.

他声称昨晚看到了一个不明飞行物。

He claims to have seen a UFO last night.

她声称昨晚看到了一个不明飞行物。

She is claiming that she saw a UFO last night.

他声称自己看见了一个不明飞行物。

He claimed that he had seen a UFO.

昨晚我在天空中看到一个不明飞行物。

I saw a ufo in the sky last night.

他们声称在农场上空发现了一个不明飞行物。

They claimed to have spotted a ufo over the farm.

昨晚我睡觉的时候一个不明飞行物降落了。

A UFO landed while I was sleeping last night.

1当一个不明飞行物着地时,我正沿着街道走.

I was walking down the street when a UFO landed.