请朗读以下重要单词: Words and Expressions domestic [da'mestik] a.家庭的;国内的 adoption [9'd5pJn] n.采用;收养 accelerate [ak'selbreit] vt.加速;vi.加速 integrate l'intigreit] vt.使整合;vi.合并 significant [sig'nifik ant] a. 有重大意义的 modernize I'modonaiz] vt.使现代化 upgrade [Ap'greid] vt.提升;升级