他的朋友失踪了。
tāde péngyǒu shīzōng le 。
His friend is missing.
许多人在这次自然灾害中失踪。
xǔduō rén zài zhècì zìrán zāihài zhōng shīzōng 。
Many people went missing in this natural disaster.
警方正在调查失踪案件。
jǐngfāng zhèngzài diàochá shīzōng ànjiàn 。
The police are investigating missing persons cases.