The overseas high school simulation class is aimed at students who are preparing to go abroad to attend secondary school. It is taught by our founder, overseas high school  teacher Alice.

海外中学模拟课堂主要面向于那些准备出国就读中学的学生。由我们的创始人，海外高中在职老师ALICE全程教授。

 Before the class, Alice mainly showed overseas teaching methods and learning environment, so that students have a preliminary understanding of studying abroad.

 课前，ALICE老师主要展示海外的教学方式和学习环境，让同学们对出国留学有了一个初步的了解。

 Then we entered the vivid science experiment class:

First of all, we need to prepare two cups, a few straws, a cup of pure water, a lemon, baking soda,  sugar, and a bag of salt.

首先我们需要准备两个杯子，若干吸管，一杯纯净水，两个鸡蛋，一个柠檬，小苏打，白砂糖，食盐各一袋。

Then, squeeze a proper amount of lemon juice and pour in an appropriate amount of baking soda and stir. At this point, a large number of bubbles were observed in the cup (reaction equation: 3NaHCO3 + C6H8O7 = C6H5O7Na3 + 3H2O + 3CO2). Then add the right amount of sugar. Homemade lemonade is finished.

然后挤出适量的柠檬汁，并且倒入适量小苏打并搅拌。此时可以观察到杯中产生了大量的气泡（反应方程式：3NaHCO3+C6H8O7=C6H5O7Na3+3H2O+3CO2）。随后加入糖适量。自制的柠檬汽水便完成了。

The benefits of lemonade: Sodium citrate and citric acid react to produce sodium citrate. Sodium citrate is weakly alkaline and contributes to blood circulation. Therefore, it has important clinical applications: when taking fresh blood, it is necessary to add some disinfected Sodium citrate can prevent blood from clotting, so sodium citrate is called anticoagulant.

柠檬水的好处：小苏打和柠檬酸反应后生成柠檬酸钠，柠檬酸钠呈弱碱性有助于血液循环，因此在临床上有重要应用：当采取新鲜血液时，需要加入一些消毒过的柠檬酸钠，即可起到防止血液凝固的作用，因此柠檬酸钠被称为抗凝血剂‘