For nearly a decade, the Chinese and Soviets have amused or alarmed the world with some of the most acerb political invective ever hurled across a border. Last week, after nearly a month of studied politeness, the two archantagonists tore into one another for the first time in the General Assembly of the United Nations. The occasion was a debate over the old Soviet proposal for a worldwide conference on disarmament, a concept that both the U.S. and China reject as unworkable.
"Bragging [and] boasting are of no avail," declared China's chief delegate Chiao Kuan-hua, his voice rising with emotion....