这种编织技术采用了多圈结构，使得围巾更加厚实温暖。

This knitting technique uses a ___multi-loop structure to make the scarf thicker and warmer.

这台设备的电路采用了多回路设计以提高安全性。

This device uses a ___multi-loop circuit design to enhance safety.

这个多循环算法可以优化复杂问题的求解过程。

The ___multi-loop algorithm can optimize the solving process for complex problems.