Although the experiments of using the credit system in these schools are enthusiastically carried out, explorations and researches on it are still a virgin ground in the academic world.

这些学校学分制实验如火如荼地展开时，学界对普通高中实行学分制的探讨和研究近乎空白。

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Virgin Atlantic Airways' Upper Class now offers complimentary ground transportation to and from airports in 26 international cities, in-flight manicures and access to airport "clubhouses" where travelers can work, dine or get a haircut.

FORBES: Magazine Article

Here, at last, was virgin territory for trying out his liberal ideas, social and economic, that had hitherto fallen on such stony ground.

ECONOMIST: Kurt Biedenkopf, king of Saxony