Consumer group this week investigated the five biggest voucher sites, and found that many discount codes are out of date or didn't work at all.

消费者权益保护机构本周调查了五大证件激增的网站，并且发现许多折扣码已经过时或者早已失效。

youdao

Consumer group this week investigated the five biggest voucher sites, and found that many discount codes are out of date or didn't work at all.

消费者权益保护机构本周调查了五大证件激增的网站，并且发现许多折扣码已经过时或者早已失效。

youdao