Similar growing conditions all along the Fujian coast make this the treasure chest for China's tea, the heart of an industry dating back almost 4,000 years.
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重点讲解:
1. date back
追溯(到);开始(于);始造(或建)(于);
eg. Some date back many centuries, but others have more recent origins.
有些节日要追溯到好几个世纪前,但也有一些源于近代。
eg. These plant fossils date back to the age of the dinosaurs.
这些植物化石可追溯至恐龙时代。
2. be let loose
放任;给予完全的自由;eg. She has all the glee of a little girl let loose in a sweetie shop.
她像糖果店里无人管束的小女孩那样兴高采烈。
eg. Trainees go through a four-hour lesson before they are let loose on the controls.
受训人员须上4小时的课才能自由进行操作。