【英语时差8,16】为何食盐中含有碘？2

 Before iodized salt became available, people living near seacoasts got adequate iodine¹ because seawater and coastal² soil contain iodine compounds. On the other hand, people living inland or in mountainous country tended to have iodine-deficient diets and a high incidence of goiter. After public-health investigators³ realized the connection between iodine deficiency and goiter, they looked for ways to insure that people living inland got the iodine they needed. The first iodized table salt was sold in Michigan in 1924. Iodized salt needs another additive⁴, a stabilizer, to keep the potassium iodide from breaking down and releasing iodine into the air in the salt box, giving the salt a chlorine-like odor. The type of sugar known as dextrose will do the job, and is often used as an iodide stabilizer.

1 iodine   

n.碘，碘酒

参考例句：

• The doctor painted iodine on the cut.医生在伤口上涂点碘酒。
• Iodine tends to localize in the thyroid.碘容易集于甲状腺。

2 coastal   

adj.海岸的，沿海的，沿岸的

参考例句：

• The ocean waves are slowly eating away the coastal rocks.大海的波浪慢慢地侵蚀着岸边的岩石。
• This country will fortify the coastal areas.该国将加强沿海地区的防御。

3 investigators   

n.调查者，审查者( investigator的名词复数 )

参考例句：

• This memo could be the smoking gun that investigators have been looking for. 这份备忘录可能是调查人员一直在寻找的证据。
• The team consisted of six investigators and two secretaries. 这个团队由六个调查人员和两个秘书组成。 来自《简明英汉词典》

4 additive   

adj.附加的；n.添加剂

参考例句：

• Colour is often an additive in foods.颜料经常是各种食物中的添加物。
• Strict safety tests are carried out on food additives.对食品添加剂进行了严格的安全检测。