| 1. | They warrant mention as possible guides .
它们作为指示元素的可能性是值得注意的。 |
| 2. | A system is a collection of interrelated components .
一个系统是相互联系的一些元素的集合。 |
| 3. | Not all of the atomic nuclei of an element are identical .
同一种元素的原子核不都是一个样的。 |
| 4. | Water is a compound containing the elements hydrogen and oxygen .
水是含有氢元素和氧元素的化合物。 |
| 5. | Before long, this element proliferation began to frustrate the chemists .
不久后，元素的这个增生开始冲击化学家们。 |
| 6. | Suitable minerals containing these two elements are still avidly sought .
目前还在竭力寻找含有这两种元素的适用材料。 |
| 7. | A system confined to the transport of mineral elements is known as the xylem .
专门用来运输矿物元素的系统称为木质部。 |
| 8. | We use the term descriptor for the "value part of the symbol table element" .
我们把符号表元素的“值”部分称作描述信息。 |
| 9. | Other materials consist of mixtures of elements, or mixture of compound .
另外一些物质是元素的混合物，或是化合物的混合物。 |
| 10. | Scientists began using spectrometers to investigate the properties of the elements .
科学家们开始使用分光计去研究元素的性质。 |
