prevention of floods and drainage of floodwater stain br>sludge br>filth br>
Related Translations:
防洪: flood protection; flood control; prevent or control flood 短语和例子防洪措施 flood control measures; 最紧迫的问题是防洪。 the most immediate problem is to control the floods.; 防洪坝 flood dam; checking dam; 防洪