but与however的区别
but后没逗号.
however后 有逗号.
e.g. I like English ,but Tom likes maths
I like English ,however, Tom likes maths
English against green chalkboard
吸血鬼与月亮的故事(大牙爱讲鬼故事)
清华博士的高效学习秘籍(清华博士用3个实验揭示学习背后的奥秘)