矮一级: a grade lower第一级: first order; first step; first stage高一级: product普一级: common上一级: upper stage下一级: earlier stage; lower stage一级船: first class ship一级词: primary word一级的: first-degree; first-grade一级风: light air一级根: root of the first order一级机: single-level machine一级浪: first wave一级米: first class rice; high grade rice一级品: al articleok article; first chop; first grade articlefine articlegood articlesuperior article; first line; first quality ware; firsts; primes一级糖: first sugar一级头: first stage一级站: first-order station一级苷: primary glycoside一阶;一级: first order第一级光谱,第一级谱: first order spectrum一级消息, 一级报文: first-level message板金工(一级): sheetmetal worker (first class)次一级构造: sub-first grade structure一级安全阀: primary safety valve for inner container一即一切: one thing