【英语时差8,16】汽水的科学（下）

The trick to preparing the perfect pop, therefore, is to keep as much of this dissolved CO2 inside the liquid as possible. One way to do this is to refrigerate your soda¹ as cold as possible, although you don’t want to freeze it. When soda is cold, the carbon dioxide molecules² have less energy to escape, and cold soda can hold more CO2. That’s why soda that you buy cold will be fizzier than soda that’s been sitting unrefrigerated on the store’s shelves. Another strategy³, which the soda bottler might do at the factory, is to load up the air at the top of the container with extra carbon dioxide, or increase the pressure of this gas. This will make it harder for the CO2 to escape, and also increase the rate at which these molecules are returned to the soda.

 

1 soda   

n.苏打水；汽水

参考例句：

• She doesn't enjoy drinking chocolate soda.她不喜欢喝巧克力汽水。
• I will freshen your drink with more soda and ice cubes.我给你的饮料重加一些苏打水和冰块。

2 molecules   

分子( molecule的名词复数 )

参考例句：

• The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
• Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里，大分子裂变为小分子。

3 strategy   

n.方法，策略，战略

参考例句：

• The only way to take the enemy position is by strategy,not by forceful attack.只可智取，不可强攻。
• Tactics differs from strategy.战术有别于战略。