the second second mean value theorem of integration  积分第二中值定理

tap-tap  敲门声

Part Second Order and Second Moment Method  部分二次二阶矩法

second by second operational analysis  瞬间操作分析

Second order second-moment method  二次二阶矩法

tap to tap time  冶炼时间; 冶炼周期

tap to tap time of converter  转炉冶炼周期

Tap-to-Tap  冶炼周期

tap-to-tap cycle  冶炼周期

Tap-to-Tap Time  冶炼周期

The Second Generation franchise management  X射线衍射

30-second  大西洋自由贸易区

3he Jinping Second Class Hydropower Station  锦屏二级水电站

8-second  监督如认为─

8-second phenomenon  8秒现象; 主管当局可─

a coupled systems of second order differential equation  二阶常微分方程组

a mandibular second molar  下颌第二恒磨牙; 贝士定则; 贝士定理

a second birth  水通道蛋白; 再生

a second derivative surface model with pure lag  带纯滞后的二阶惯性环节