Coal is formed from the remains of freshwater plants.
煤是由淡水植物遗骸形成的.
📖 牛津释义
freshwater
adj [attrib 作定语]
from, of, living in or containing fresh (not salty or sea) water 来自淡水的; 淡水的; 生活於淡水的; 含淡水的: freshwater fish 淡水鱼
freshwater lakes 淡水湖. Cf 参看 saltwater (salt).