water tight structure

• 不透水结构

water tight structure的用法和样例：

例句

1. The structure of water consumption should be rationalized with more water available for ecological purpose.
   用水结构趋于合理，生态用水逐步增加。
2. Structural characterization may include a determination of amino acid sequence, amino acid composition, peptide map, and carbohydrate structure.
   结构界定可能包括氨基酸序列，氨基酸组成，缩氨酸图和碳水结构。