untapped

1. ADJ An untapped supply or source of something has not yet been used. (供給、資源)未利用的[usu ADJ n]

Mongolia, although poor, has considerable untapped resources of oil and minerals. 蒙古雖然貧窮，卻有相當(dāng)儲(chǔ)量未利用的石油和礦物資源。