高考But humans enjoyed all of these advantages for a full 2 million years during which they remained weak and marginal creature.

但人类在整整200万年的时间里享受着所有这些优势，在此期间，他们仍然是弱小的边缘生物。

2019年高考英语江苏卷 阅读理解 任务型阅读 原文

六级The reasoning behind this saying is that low oil prices discourage investment in new production capacity, eventually shifting the oil supply curve backward and bringing prices back up as existing oil fields—which can be tapped at relatively low marginal cost—are depleted.

这一说法背后的理由是，低油价阻碍了对新产能的投资，最终使石油供应曲线向后移动，并随着可以以相对较低的边际成本开采的现有油田枯竭而使价格回升。

2017年6月阅读原文

六级The reasoning behind this saying is that low oil prices discourage investment in new production capacity, eventually shifting the oil supply curve backward and bringing prices back up as existing oil fields—which can be tapped at relatively low marginal c

这句话背后的理由是，低油价阻碍了对新产能的投资，最终将石油供应曲线向后移动，并使价格回升，成为可以以相对较低的边际成本开采的现有油田

2017年6月六级真题（第一套）阅读 Section B

六级Still, at the most selective schools, where thousands of candidates may submit identically high grades and test scores, a marginal item like the essay may serve as a tie-breaker between two equally qualified candidates.

尽管如此，在最具选择性的学校，数千名考生可能会提交相同的高分和考试分数，像这篇文章这样的边缘项目可能会打破两名同等资格考生之间的平局。

2013年12月阅读原文

六级Still, at the most selective schools, where thousands of candidates may submit identically high grades and test scores, a marginal item like the essay may serve as a tie-breaker between two equally qualified candidates.

尽管如此，在最挑剔的学校，成千上万的考生可能会提交同样高的成绩和考试成绩，像论文这样的边缘项目可能会成为两个同样合格的考生之间的平局。

2013年12月六级考试真题（三）

考研Many drift into marginal areas.

许多人流落到边缘地区。

1989年全国硕士研究生入学统一考试英语试题