Dr. Lee believes that men who exercise can halve their risk of colon cancer.
李医生认为,男人坚持锻炼,可以使他们患结肠癌的风险减半。
Some goods, like English newspapers, keep the same price for years, but Chinese flowering cabbage can double and then halve in price in months.
一些产品,比如英文报纸,多年来都保持着同一个价格,但是菜心的价格在几个月内可能翻一番,接着又减半。