The subsequent two decades have seen much observational and theoretical work aimed at this problem.(接下來的二十年中，有許多觀察和理論的研究是專注在這問題上。)

Theory and some observational data pointed to the likelihood that they were ubiquitous.(理論和一些觀測(cè)數(shù)據(jù)則指向他們?cè)?jīng)普遍存在的可能性。)

Jane herself had predicted this finding, from observational data, two decades earlier.(其實(shí)早在二十年前，珍從觀測(cè)數(shù)據(jù)中就已經(jīng)預(yù)測(cè)到了這樣的發(fā)現(xiàn)。)

For some of these questions, observational studies are the best we are going to get.(因?yàn)檫@樣的一些問題，觀察性的研究是我們所擁有的最好方式。)

He added: "People have been killed. People have been hurt. It's more than observational kind of data."(他又補(bǔ)充說：“有人被殺，有人被傷害。現(xiàn)實(shí)遠(yuǎn)比只能靠觀察得出的數(shù)據(jù)復(fù)雜。”)

Observational humor is often a call-back or reference to something that got a laugh earlier.(通過觀察而作的幽默常常是對(duì)早些時(shí)候的笑話的回味或以此為參考。)

Observational studies are often misleading.(觀測(cè)研究常常會(huì)誤導(dǎo)。)

Researchers created a new supercomputer model, based on observational data and the "Lambda Cold Dark Matter" theory of the universe.(研究人員在觀測(cè)數(shù)據(jù)和蘭姆達(dá)冷暗物質(zhì)模型的基礎(chǔ)上構(gòu)建了一個(gè)新的計(jì)算模型。)

The observational work is carried out on a range of telescopes.(觀測(cè)工作是借助于各種望遠(yuǎn)鏡來進(jìn)行的。)

Observational assessment techniques have become much more sophisticated, reducing the limitations just presented.(觀察性評(píng)估技術(shù)已經(jīng)變得更加復(fù)雜，它減少了剛剛提出的限制。)