Williams syndrome: A genetic disorder characterized by mild mental retardation, unique personality characteristics, unusual facial features, and cardiovascular disease. The level of calcium tends to be high in blood (hypercalcemia) and urine (hypercalciuria).
Long March: Long March, (1934â35), the 6,000-mile (10,000-km) historic trek of the Chinese communists, which resulted in the relocation of the communist revolutionary base from southeastern to northwestern China and in the emergence of Mao Zedong as the undisputed party leader. Fighting Nationalist forces
The Tiananmen Square protests of 1989, commonly known in mainland China as the June Fourth Incident, were student-led demonstrations in Beijing, the capital of the People's Republic of China, in 1989. More broadly, it refers to the popular national movement inspired by the Beijing protests during that period, sometimes called the '89 Democracy Movement. The protests were forcibly suppressed after the government declared martial law. In what became known in the West as the Tiananmen Square Massac