The audit team discovered the duplicate charge only after the fact, so the customer had already been billed.
审计团队事后才发现重复收费，因此客户当时已经被扣了款。
来源：Expression Original Learning Examples — 阅读必备库 — batch14 · Expression Editorial Team段 editorial-base-after-the-factOriginal English example and Chinese translation written for Expression; no third-party sentence text is reproduced.
