上周的雾霾导致抗霾产品的销量大增，可是严重的雾霾又让电商无法及时把货送到买家手中。请看本报昨日的报道：

    Near-record pollution levels in parts of China last week proved a two-edged sword for the country’s e-commerce titans: orders poured in for anti-smog products, but transport restrictions meant it was a challenge to get these delivered.

    Up to 50 million orders in northern China alone face delivery delays due to grounded planes, closed highways and traffic bans, a spokeswoman for Alibaba Holding Group Ltd. Told Reuters, citing affiliate Cainiao Network Technology Co. Ltd., which oversees China’s largest logistics firms.

    报道中的two-edged sword就是“双刃剑”，这个比喻的说法来自阿拉伯语，如果刀刃的两面都很锋利，那么伤人的同时也可能伤到自己，这个词就是“有利有弊”的意思。例如：

    The development of technology is always a two-edged sword.

    技术的发展对于人类来说永远都是一把双刃剑。