Myparticularexperienceislargelyinoil,andthesearchforoilhasdonemoretoimprovedeepdrillingthananyotherminingactive.hasdone在这什么成份?deep什么成份什么意思?drilling什么成份什么意思?

Question

My particular experience is largely in oil ,and the search for oil has done more to improve deep drilling than any other mining active.has done在这什么成份?deep什么成份什么意思?drilling什么成份什么意思?

Answer 1

整段话是两句话,用and连接.and后面的句子,主语是　the search for oil　石油的寻找　谓语是　has done　现在完成,已经做了,已经完成　　　　后面的to.是不定式做状语,表示目的,为提高深层钻孔　比其它的挖矿方式　　...