n.人工降雨
Local meteorological authorities urged artificial rainmaking efforts to increase soil moisture. 當(dāng)?shù)貧庀缶志o急實施人工降雨,從而提高土地濕度。
Artificial rainmaking is practised in many countries but its success is hard to prove. 許多國家都開展了人工降雨,但難以證實其成功作用。