HSK 6
Yīshēng duì shāngkǒu jìnxíng le zǐxì de tànchá.
The doctor carefully probed the wound.
HSK 7-9
Zhēntàn pài rén qù tànchá xiányírén de xíngzōng.
The detective sent someone to scout out the suspect's whereabouts.
HSK 7-9
Kēxuéjiā lìyòng shēngnà tànchá hǎidǐ dìxíng.
Scientists used sonar to probe the underwater terrain.