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。
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+ 。
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。