He attends school sporadically.他上学时断时续。Everybody consciously attends to things and everything is attended to.人人自觉管,事事有人管.He attends regular yoga classes.他定期上瑜伽课....
以单质碘为催化剂合成了环戊酮乙二缩酮.Cyclopentanone ethylene ketal was synthesized with I _ 2 as catalyst.传统的缩酮化、酯化反应工业上多采用浓硫酸作催化剂.Traditional ketalization and esterification reactions are usually catalyzed by concentrated acid in industr...
The basic principle and one - dimensional mathematic model of MagnetoHydrodynamic ( MHD ) controlled inlet were presented.阐述了 磁控 进气道的基本原理,建立了一 维 数学模型.The stability of large - scale magnetohydrodynamic ( MHD ) modes is cr...