ground water ,surface water 分别指的是什么水

ground water是什么意思啊? semi-ground water ground water 和 underground water谁对 There is () of water on the ground ground water ,surface water 分别指的是什么水 ground ground ground ground ground roots bring water from the ground to the plant对WATER划线提问 请问water-ground是什么意思?整句是After calcinations the product is water-ground and sieved to produce a fine powder easily dispersible in aqueous suspensions. Raindrops alone the ground,only water with them.什麼意思 when the sun d----- up the water,people can get salt from yhe ground.首字母填空 Raindrops alone the ground,only water with them.什麼意思 We fell prone on the ground and drank water from the spring. 首字母：When then sun dries up the water,salt can be got f____the ground. like a sudden drop in the water level in the ground 求翻译～