基本解释[地球科学]苏联英汉例句双语例句Su-17 and its export variants Su-20 and Su-22 were the basis of the USSR’s aircraft as well as of 12 other countries of the world.苏-17以及其出口型苏-20和苏-22是苏联及世界上另外12个国家的中坚力量。su ussr更多例句词组短语短语su -USSR 苏联su ussr更多词组专业释义地球科学苏联