The footbridge had been closed for some time before engineers found a safe way to repair it.
工程师找到安全的维修方法之前，这座人行桥已经关闭了一段时间。
来源：Expression Original Learning Examples — 阅读必备库 — batch21 · Expression Editorial Team段 editorial-base-for-some-timeOriginal English example and Chinese translation written for Expression; no third-party sentence text is reproduced.
