chalk talk 边板书边讲话
【讲解】
这是一条名词性的习语。该习语源向教育界，指的是老师边在黑板上写字边讲课的样子chalk指“用粉笔写，画”，talk指“讲话”,该词组可形象理解为“边板书边说”。
【对话】
A:What is Mary doing with her friends?
A:玛丽和她的小伙伴们在干吗？
B:She's giving them a chalk talk of a mathematies problem.
B：她正连写带画地给他们讲一道数学题呢。
A:She's really like a little teacher.
A:她真像一个小老师。
