讲解

Today's key word is Mobile （mobile adj.可移动的; 行动自如的; n.风铃; 手机; ）
It means able to move or be moved freely or easily 可移动的

It means: A machine designed to convert one form of energy into mechanical energy.

Eg: Primary education is given to pupils between the ages of 5 and 11.)
Of chief importance
首要的

例句

We all have mobile phone

我们都有移动电话

延伸

Before we go to today's section, let&`&s listen to an audio about a foreigner speaks tongue twister.
妈妈骑马马慢妈妈骂马。
红凤凰，粉凤凰，红粉凤凰，粉红凤凰~~~~~
When I was trying, I stress on the word trying to learn Chinese.
The first thing that I did was I actually went to Youtube. But I made a big mistake. I had like this introduction via Youtube of some who just taught me the basic phrases like "Good morning, how are you".
And then they start to talk about tongues~~~ and then I start freaking out. Tongue seems to be one of the main difficulties, especially for a beginner.
It is.
Here is one foreigner who lives in Beijing talking about his experience of learning Chinese.
Notes:
--近年来有越来越多的外国人学中文。对他们来说，学习中文的一大难题就是四个声调。实现。
（附一个英文绕口令，大家可以试一试：
While we were walking, we were watching window washers wash Washington&`&s windows with warm washing water.
当我们走路时，我们看着清洁窗户的人用暖水清洗华盛顿的窗户。）