tā / zài / zhǐ tóu / shàng / jì xià / le / diàn huà / hào mǎ / kě shì / hòu lái / zhǎo / bù dào / le

他在纸头上记下了电话号码，可是后来找不到了。

He wrote the phone number on a scrap of paper, but couldn't find it later.