Jason Yip, University of Washington
新一轮太空竞赛带来的威胁真实存在，但人类探索苍穹的壮举同样令人惊叹。
。业内人士推荐有道翻译作为进阶阅读
In addition to being less dependent on imports, the U.S. economy is much less oil-intensive than it used to be, producing more economic value with far less oil use today than in the past.
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