原级：refine
现在分词：refining
refines
过去分词：refined
\u0039\u0031\u0031\u67E5\u8BE2\u00B7\u82F1\u8BED\u5355\u8BCD
过去式：refined
1. The general principle is to first push the inner breath into a " small heavenly circle ", which refines the energy and transforms the breath.