To be honest, she was more of a hindrance than a help.说实在的，她没帮上忙，反而成了累赘。Lack of experience does not constitute a major hindrance to progress.经验缺乏并不是进步的主要障碍.Now they can construct tunnel systems without hindrance.现在他们可以顺利...
Dongting Lake area is a typical fragile lake - land ecotone.洞庭湖区是典型的水陆生态交错脆弱带,也是全球重要湿地之一.Computer simulation of water movement and heat transfer in groundwater - soil - vegetation - atmosphere continuum at oasis - desert...