content of six elements的用法和樣例：
例句
- Suitable minerals containing these two elements are still avidly sought.
目前還在竭力尋找含有這兩種元素的適用材料。 - They expected to see low concentrations above the shoreline and larger concentrations below.That would indicate that the elements had been leached out of the soil by the water.
科學家們利用這種分光計來測量他們所猜測的古老海洋海岸線之上及其下面的鉀，釷，鐵三種元素的含量。
