单中心上下半野技术
mono isocentric irradiation technique
单调上下文有关语法
monotone context sensitive syntax
大衣式前身由上至下钉钮的制服
coat style uniform with shank button to hem
大气上下层相互
interaction between the upper and lower atmosphere
错时上下班制度
alternative work schedules
从上下半连续
lower semi-continuous from above functional