“over many years”可以造什么句，over many years造句

Various studies over many years have sought to identify candidate genes but so far inconclusively.

"His' Helga 'pictures, a large group of intimate portraits of a neighbor, painted over many years, were first shown publicly in 1986," the InfoPlease biography says.

They are keen observers of people, and they have discipline and expertise, honed over many years, to turn observation into verifiable fact.

The author discusses several questions related to Yuan dynasty blue-and-white porcelain vessels on the basis of previous studies by scholars and his own research findings gleaned over many years.

American firms used to be allowed to amortise goodwill over many years.

The position would normally require a person with skills and experience acquired over many years (for example, senior academics or scientists).

These interviews by Dennis o 'driscoll, an old friend, were carried out over many years mainly by post and must, for the time being, serve as biography and autobiography.

These words, repeated in this way from time to time over many years, formed links in an unbroken chain of friendship between them.

Chronic forms of pancreatitis can devastate a person's life over many years.