Imposing speed restrictions is easy, but forcing motorists to observe them is trickier.限制车速容易，但强制司机遵守这些限速规定就难办多了。The country's salvation lies in forcing through democratic reforms...拯救国家的希望在于强制推行民主改革。They pursue oth...
In the 1960 s the IC market was broadly on bipolar transistors.六十年代集成电路市场主要为双极型晶体管.the bipolar world of the postwar period.战后的两极世界Perfectly normal bipolar embryoids are formed.形成完全正常的两极胚状体.Because of their simplicity, bi...