30元半价用英文怎么说

30元半价用英语可以表达为 "30 yuan at half price" 或者 "30 yuan at 50% off."

这种表达方式源自商业和贸易中的定价策略，即在促销活动期间提供折扣或优惠价格，以吸引消费者购买。

下面是一些例句，希望对您有帮助：

"This shirt is on sale for 30 yuan at half price." (这件衬衫半价30元卖。)
"The store is offering 50% off on all clothing this weekend." (这家商店本周末所有服装都有50%的折扣。)
"I got this dress at 50% off the original price." (我用半价买到了这件连衣裙。)
"The sale ends today, so don't miss out on the chance to save 50% on your purchase." (促销活动今天结束，别错过机会节省50%的购买成本。)