1、I don't like the idea of substituting something else in place of the undelivered goods.
我不同意未交貨部分用其他東西代替。

2、After the postal strike there are a huge backlog of undelivered mails
郵政部門罷工以後，大量郵件積壓下來。

3、After the postal strike there are a huge backlog of undelivered mails.
郵政部門罷工以後，大量郵件積壓下來。

4、Assist purchasing clerk to urge the shipment of the undelivered goods.
協(xié)助采購催收應到而未到的物品。

undelivered翻譯