He said his goodbyes knowing that a long time would pass before he would see his child again.

他道了别，清楚要过很久才能再见到他的孩子。

《柯林斯英汉双解大词典》

Take time to go for a long walk for enjoyment when visiting a new place, which will allow you to listen, smell, and see the different culture and sights that your busy life may stop you from enjoying.

当你到一个新的地方旅游时，花点时间去散步享受一下，这会让你听到，闻到，看到不同的文化和风景，而你的繁忙生活可能会不让你享受它们。

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John went to see his doctor one day, because he had a stomachache for a long time.

一天，约翰去看医生，因为他胃痛了很长时间。

youdao

"The U.S.data should remind us that this recovery is not likely to be V-shaped It seems to me that we are going to see rising unemployment for a long time yet,"

VOA: standard.2009.08.05

There you see continuity for a very, very long time.

在那里你可以发现时间跨度有很长的连续性

耶鲁公开课 - 古希腊历史简介课程节选

If the NFL owners lock out the players this offseason, this is the last game we will see for a long time.

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"It's the first time in a long, long time that you could see someone who's not a quarterback significantly affect the betting line because of an injury, " said Jimmy Vaccaro, the director of sports operations at Lucky's Race and Sportsbook in Las Vegas.

WSJ: An NFL Season Hinges on Rob Gronkowski's Ankle

Now, we have a package, as we work through the differences between the House and the Senate, and we'll put it up on a Web site for all to see over a long period of time, that meets those criteria, meets those goals.

WHITEHOUSE: President Obama Holds News Conference