我们能源系统的主要组成部分，如燃料生产、提炼、发电和分配，用的是昂贵的、使用寿命较长的装置。
The major components of our energy systems, such as fuel production, refining, electrical generation and distribution, are costly installation that have lengthy life span.
在欠发达国家，如撒哈拉以南的非洲和东南亚国家，（食物）浪费往往主要发生在供应链的农民生产者端。
In less-developed countries, such as those of sub-Saharan Africa and South-East Asia, wastage tends to occur primarily at the farmer-producer end of the supply chain.
他们争论的主要难题是，稀土金属如钕的生产通常用来制作磁铁。
The main bottleneck, they argue, could be the production of rare earth metals such as neodymium, which is often used in making magnets.
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