addition key加法键additionn.增加；加法；附加物additional dynamic load附加动荷载additional displacement附加位移additional acceleration附加加速度additional depreciation补提折旧addition of chromosomes染色体的附加additional construction增建工程additional pressure bar附加压力棒addition by subtraction采用减法运算的加法Additional prescription加味方additional call library附加调入程序库