Plants and animals are responsible for a variety of useful medications. In fact, about forty percent of all prescriptions written today are composed from the natural compounds of different species. These species not only save lives, but they contribute to a prospering pharmaceutical industry worth over $40 billion annually. Unfortunately, only 5% of known plant species have been screened for their medicinal values, although we continue to lose up to 100 species daily. The Pacific yew, a slow-growing tree found in the ancient forests of the Pacific Northwest, was historically considered a "trash" tree (it was burned after clearcutting). However, a substance in its bark was recently identified as one of the most promising treatments for ovarian and breast cancer. Additionally, more than 3 million American heart disease sufferers would PERISH within 72 hours of a heart attack without digitalis, a drug derived from the purple foxglove. * Questions Give the Vietnamese meanings of the 12 words underlined in the passage For what do we have to save the endangered species? How many species do we lose up to daily? Where was the Pacific yew found? Give the opposite meaning of the word “ PERISH ”.