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Key words：
1. devote vt. 把…献给；把…专用于；专心于
记牢：devote …to…把…用于；把…奉献于
be devoted to/ devote(oneself) to致力于；献身于，to为介词。
Key words：
2. estimate vt. 估计；估价；估算 n.估计；估算
be estimated to be 估计是
It is estimated that…据估计
Yuan Longping, known as the “father of hybrid", is one of China’s most famous scientists. From an early age, what concerned him most was that farmers often had poor harvests and sometimes even had a serious shortage of food to eat. To tackle this crisis, he chose
to study agriculture and research hybrid rice. Then through intense effort, Yuan developed the first hybrid rice that could be used for farmers to expand their outputgreatly.Yuan's innovation has helped feed not just China, but many other countries that depend_on rice as well. He makes large_donations to support agricultural research. What impresses people most about Yuan Longping is his ongoing ability to fulfill his dreams.
A vast underground shelter built during World War II has been turned into an urban farm, supplying supermarkets and restaurants in London. The shelter, which could protect up to 8000 people from wartime bombs, was comprised oftwo large tunnels that were intended to one day become an extension of the London Underground. But that never became reality and the shelter was left for 70 years.
