Noun:

1. (baseball) the person who plays second base

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-hand knowledge/opinions间接知识；拾人牙慧的观点Second division of trigeminal nerve三叉神经第二分支second-order compressibility rule二阶可压缩性法则second order reduced density matrix二阶约化密度矩阵Second-order optical nonlinearity二阶非线性光学性质second order boundary value problem二阶边值问题second PiSschl - Teller potential第二类P6schl-Teller势Second specialized nursing students中护学生second order differential equations二阶微分方程second order loss sensitivity index网损灵敏度二阶指标