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ascertain [ascertained, ascertaining, ascertains]▼(find out; discover or establish)verb[UK: ˌæ.sə.ˈteɪn] [US: ˌæ.sər.ˈteɪn]
drill [drilled, drilling, drills]▼(to investigate closer)verb[UK: drɪl] [US: ˈdrɪl]
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