We have conducted an extensive search. The boy is nowhere to be found.

我们已经展开大范围搜索。到处都没有人影。

Furthermore, despite an extensive search by the SETI project, we haven't heard any alien television quiz shows.

再说，即便 SETI 计划已进行广泛探索，我们还没有收听到任何外太空电视答问节目。

Then, one of the party was sent back to the village, to collect the inhabitants for a more extensive search.

于是他们派了一个人返回村庄，召集更多的村民进行更彻底地搜索。

Extensive searches have taken place across the South China Sea to the Indian Ocean. But it has not been found.

从南中国海到印度洋进行了广泛的搜索。但是飞机还未被发现。

They had extensive searches for every single person.

他们对每一个人都进行了广泛的搜查。

The  search for the missing airplane remains the most extensive search in aviation history.

对失踪飞机的搜索仍然是航空史上最广泛的搜索。

After an extensive search, all were presumed dead by local authorities.

经过全面搜查后 当地警方假设她们都已死亡。

After an extensive search, Rivera was found in an area of the lake where heavy brush and trees were found on the lake bed.

经过大范围的搜索，里维拉在湖的一个区域被发现，那里的湖床上有茂密的灌木和树木。