The results showed that wood from the creosote-treated railroad ties removed after years of
service had sufcient potential residual strength for use in exterior structural applications.
removed 应该如何翻译？？
參考答案:服役到期从铁路上拆下来....
the results showed that-> the wood which was from the creosote-treated railroad ties-> which was removed after years of service-> the wood had ....
