The needs generated by these additional capacities were then compared to the identified resources (137 million tons). It is important to underline that the resources considered in our model concern all the 17 elements constituting the rare earths family. However,some rare earths...
REMs are further broken down into heavy and light categories where heavy rare earth elements (HREE) are considered more valuable than light rare earth elements (LREE). Both types of lanthanides are non-radioactive, and they’re highly desired for many clean energy, engineering, and manufacturing ...
One is usually able to distinguish different layers within soils, called soil horizons (Figure 5). These horizons interact with each other, and therefore cannot be considered as independent, although they can be very different from each other. There is great complexity and diversity in soil horizo...
如果一场epidemic得不到控制，并让它不断蔓延开来，公共卫生官员可能就要开始称之为pandemic，意思是 it’s affected enough people in different areas of the world to be considered a global outbreak（这场流行病已经影响到世界不同地区足够多的人，到了全球性暴发的程度）。简而言之，pandemic就是全球性的流行...
[听力原文] 32-35 The diamond is considered the most famous, elegant and valuable jewel in the world. It is the hardest substance found in nature. Its hardness and high dispersion of light make it useful for industrial applications and jewelry. Diamonds were made as a result of great volcan...
One may think that it is the book writer who is in the best position to do film adaptations. In fact, sometimes authors are very involved in the process and may even be the screenwriter. This can actually be a disadvantage because they may be too close to the material and find it diffi...
The conventional wisdom says no, but by mid-century that assessment- along with the sniffles - may well be ancient history. Colds are considered incurable today because it would take months to come up with a vaccine for every new strain. That's fine for the flu, which breeds in animals ...
What a Relict Species Is Not? Most of the problems with the concept of relicts come from associated concepts that are not formally part of this definition. Because they are survivors, relicts are often misleadingly considered as “missing links”, “living ancestors” or “primitive or basal ...
Governments around the world are pushing for an end to plastic straws (吸管) and bags. More and more businesses are turning to paper products as a choice. Paper is considered by many to be better than plastic. However...
As a participant, I reckon that this project is of great significance, which may bring us the sense of thrift, arouse our passion for life and help others in need. (187words) 【范文译文】 本报告的目的是介绍我作为一名学生刚参加完的一个学校项目:收集校园中的二手书。