four-stage

The four stages of creative thought are preparation, incubation, illumination, and verification.

思考的四个阶段是准备、沉思、启迪、求证。

Larval stages could be divided into four stages: nauplius, protozea, zoea and postlarva.

幼体的发育可成四期:无节幼体、蚤状幼体、糠虾及仔虾。

The khondalite lithology is composed of a suit of metamorphic aluminium-sedimentary rock.During the Jinning movement, the sedmentary rock experienced four stages of metamorphism.

明确黄陵地区孔岩系为一套变质的富铝质沉积岩组合，在晋宁期山运动期间该套岩系经历四期变质作用。