1)schungite,次石墨2)subgraphite,次石墨3)graphitoid,次石墨4)schungite,shungite,次石墨（地）5)primary graphite,一次石墨6)secondary graphite,二次石墨7)the first oil crisis,第一次石油危机
用法例句
During the period of the first oil crisis, the oil producing countries in the Middle East not only used the petroleum as arms to fight against those countries such as the United States that supported Israel, but also fought against countries such as Japan that took"neutral"policies.
