ภาษาอังกฤษวันละคำ : ascertain (a ser TEIN)

The verb ascertain means to discover something or to make certain of something. ...

• Mr To ascertain that the bomb detectors are effective, the army’s Anothai bomb disposal unit on Wednesday demonstrated the use of the GT200 before media representatives.
• The ministry has asked the IEAT and the Industrial Works Department to survey all factories that require EIAs to ascertain within 60 days whether the studies have been correctly performed, he said.
• Evy Mr Narit has three criteria to ascertain whether a person is competent..
• Thai workers should only be permitted to leave Thai shores when the ministry can ascertain that there are jobs waiting for them at the other end. ...

(From Bangkok Post)