To pick up stg (捡东西)
Tā bǎ diào zài dìshàng de dōngxi jiǎnle qǐlái
He picked up all the things that fell on the floor.
You can also find this with 捡拾 (Jiǎnshí) : to pick up
Cóng hǎitān jiǎnshí hǎicǎo shì wéifǎ de.
It is illegal to pick seeweed from the beach