孤立无助

Explanation: Only one person or one's power, without external assistance. 　　Source: "Han Ban Chao Biography": "Eighteen years, Dibeng, Yanqi to lose China, then attack Mu Chen did not have protection, super-isolated." 　　Examples: Sleep is not complicated by Law, not Yao Xiao Xing, ~, a knowledge chilling. (Song Zhouhui "Shiba magazine" Paper) Thesaurus:  start a solo run, isolated force bury, Zhi-Yong complete in both respects, high and dry