369. But most experts agree that some research activity is essential to keep the staff and their students in touch with the latest developments in their subjects.

英語四級譯文:
但是大多數專家都認同，為了讓教職員及學生接觸到其學科的最新發展，一些科研活動是必要的。

四級詞匯講解:
that引導的是agree的賓語從句。be essential to do sth.意為“做某事絕對重，必不可少”。如:Good food and plenty of exercise are essential to lead a healthy life.要想健康地生活，吃得好并進行大量的鍛煉是非常重要的。

keep in touch with sth.此處意為“獲得某方面的最新信息(知識等)”。如:We are able to keep in touch with events of the outside world via the Internet.通過互聯網我們能夠了解到外界發生的事。

英語四級考點歸納:
有關touch的常見短語還有:

※ be/get/keep in touch with sb.意為“與某人有/獲得/保持聯系”。如:
I'm still in touch with my friends from college.我和大學的朋友還有聯系。
They're trying to get in touch with the manager.他們正設法和經理取得聯系。
Let's keep in touch。我們要保持聯系。

※ be out of tough和lose touch都意為“失去聯系”，后接介詞with也都可以指“不再了解”。如:
I'm out of touch with many old friends now.=I've lost touch with many old friends.我現在和很多老朋友都失去了聯系。
You are out of touch with real life. = You've lost touch with real life.你脫離了現實生活。