Still loosing this part so it doesn't get flat.

仍然失去这部分，所以它不会变平。

Clym ran to her side, and found he could only check the rope by twisting the loose part round the upright post, when it stopped with a jerk.

克林忙跑了过来，发现他只有把绳子松的那一部分绕在柱子上，才能将它拉住，绳子猛地一下停住了。