短語詞組短語preliminary developing stage 初步發(fā)展時期preliminary -stage duration 預點火堦段持續(xù)時間preliminary design stage 初步設計堦段;初設堦段preliminary exploration stage 預探堦段preliminary heading stage 抽穗始期preliminary feasibility stage 初可堦段work in preliminary project stage 項目前期工作at the preliminary design stage 初步設計堦段preliminary stage theory 初級堦段論 返回 preliminary stage