常見例句The source regions of the Yellow River are crucial water resources in China and the important part of China's Watertower. 摘要黃河源頭區(qū)是我國重要的水源涵養(yǎng)地區(qū)，是“中華水塔”的重要組成部分。cooling watertower 涼水塔 返回 watertower