• 坚硬的土壤

Firmo菲尔莫firmn.公司；商行adj.坚定的；结实的；坚固的；严格的v.(使)变得坚实；确定adv.稳固地；坚定地firm against the pounds(美元等)比英镑坚挺firm and elastic breast结实而有弹性的乳房Firm's Marketing Ethics污染种类firm-specific factors特定企业变量firming of interest rate利率坚挺, 利率呈上升趋势firms' spanning-region污染事件firm commitment offering确定承诺出价Firm' s Equilibrium Area污染场地Firm-level Information公司层面信息firm specific investment企业型专用性投资