“活门”概念、定义、翻译-科学时代

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。

单词	活门
释义	化工词汇手册活门 valve
随便看	stratified logrank test stratified medium stratified mixed stand stratified multiobjective programming stratified multi-stage sampling stratified ocean stratified randomization stratified random sampling stratified random sampling stratified random sampling stratified random sampling stratified sample stratified sample stratified sample stratified sample stratified sampling stratified sampling stratified sampling stratified sampling stratified sampling stratified sampling stratified sampling stratified sampling stratified sampling stratified sampling