易混淆的单词： Thalweg

This eventually meant the transfer of about 700 river islands on the chinese side of the thalweg which until then almost all had been under soviet control - among them zhenbao island .

这最终使得原本属于苏联控制，位于河流最深谷底线中国侧的约700座岛屿（包括珍宝岛）都划入中国领土。