secondness第二性
secondadj.第二的;次等的;再一个的num.第二n.片刻;秒adv.第二;其次v.支持;赞成;附和;调派
second-order moments of intensity强度二阶矩
Second-generation progeny testing二代家系
Second- order Hamiltonian Systems
second order differential titration二阶微分滴定
second-order differential equation二级微分方程
second order abstract Cauchy problem二阶抽象微分方程
second-order optimality conditions二阶最优性条件
second language acquisition theories二语习得理论
Second is voluntarism enhancement.非营利部门的传统支持减弱。