1. 草甸，草原   summit, top   countryside   cave   meadow, grassland   Hint Half-n-half Clue   2. 山口   river bank   mountain pass   shore   trench   Half-n-half Clue   3. 峭壁   countryside   cliff   rainforest   swamp   Half-n-half Clue   4. 池塘   rainforest   beach   pond   cliff   Half-n-half Clue   5. 雨林   stream   rainforest   forest, woods   mountain pass   Half-n-half Clue   6. 山脉   archipelago   mountain range   cave   sea bed   Half-n-half Clue   7. 海底   coast   sea bed   meadow, grassland   territory   Half-n-half Clue