explain and understand造句

• Come to my side , jane , and let us explain and understand one another
  “到我身边来，简，让我们解释一下，相互谅解吧。 ”
• The teacher is walking to and fro in the classroom , using gesture to help explain and understanding
  老师在教室里走来走去，用手势帮助讲理解。
• These three basic rules are used to explain and understand the phenomena and the reason of fluctuation in the modern stock market
  用这三个基本规律来解释和认识现代股市中的波动现象和波动的原因。