铃: 名1.(金属制成的响器) bell 短语和例子电铃 an electric bell; 警铃 alarm bell; 门铃 door bell2.(铃状物) bell-shaped things 短语和例子哑铃 dumbbell; 杠铃 barbell3.(蕾铃) boll; bud 短语和例子棉铃 cotton boll; 落铃 shedding of cotton bo
方程: [数学] equation 短语和例子三次方程 cubic equation; 高次方程 equation of higher degree; 线性方程 linear equation; 把方程式简化成 ... reduce the equation to ...; 物态方程 equation of state; 化学方程 chemical equation
