互访: exchange visits...
不但……而且……: Not only... But also......
技术: technology, technique, skill...
海关: customs (i.e. border crossing inspection)...
媳妇: daughter-in-law, wife (of a younger man), young married woman, young woman...
公用: public, for public use...
猛烈: fierce, violent (criticism etc)...
投入: to throw into, to put into, to throw oneself into, to participate in, to invest in, absorbed, engrossed...
游览: to go sightseeing, to tour, to visit...
疼痛: pain, ache, sore...
