stratified teaching是什么意思

stratified teaching是什么意思 teaching teaching I am teaching English.为什么teaching是现在分词?my job is teaching english 为什么teaching是动名词? communicative teaching method 是指的什么? teaching is learning 是句谚语 翻译“We used a stratified,multistage,cluster-sampling design.” thanks for teaching [ ] 【I】English?是me还是my?为什么 language teaching nice teaching teaching是什么意思 Practical Teaching teaching是什么意思? Teaching procedures teaching是什么意思 faculty;teaching non-teaching No previous teaching experience is required.这句话的断句是No （previous teaching experience is required）.还是(No previous teaching experience) is required?是不需要教学经验,还是必须不要教学经验啊?好绕好绕,麻烦大