1. Moving rapidly through school, he graduated Phi Beta Kappa from the University of Kentucky at age 18.
在学校进步迅速，他十八岁时以优等生身份从肯塔基大学毕业。
《柯林斯英汉双解大词典》
2. The easy ones are on the diagonal: we both get B- if we both choose Alpha; we both get B+ if we both choose Beta.
在对角线上就更直观了：如果我们都选 α 的话得B- ，如果我们都选 β 的话得 B+ 。
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3. The plan has good chances of success, since sweet potato is a staple of the region's diet and agriculture, and the varieties currently grown contain little beta-carotene.
该计划成功的机会很大，因为红薯是该地区的主食和主要农产品，而且目前种植的品种几乎不含胡萝卜素。
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4. Most of the purported health benefits of tea come from antioxidants—compounds also found in beta carotene, vitamin E, and vitamin C that inhibit the formation of plaque along the body's blood vessels.
