The karst mountain areas in Southwest China are one of the universally acknowledged ecologically vulnerable systems and one of the representatively poverty-stricken regions in China.是什么意思_The karst mountain areas in Southwest China are one of the universally acknowledged ecologically vulnerable systems and one of the representatively poverty-stricken regions in China.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句