5个泛函的不动点定理
five functionals fixed point theorem
CH2中曲面的不变量
invariants for surfaces in CH2
El Nino的不同类型
different categories of El Nino
Sadovskii的不动点定理
sadovskii fixed point theorem
艾罗的不可能定理
Arrow’s impossibility theorem
百折不挠
be undaunted by repeated setbacks
keep on fighting in spite of all setbacks
be indomitable
保兑的不可撤销的信用证
confermed irrevocable letter of credit
苯乙酮的不对称氢转移反应
asymmetric transfer hydrogenation of acetophenone
标准气体的不确定度
uncertainty of calibration gases