This decision is also hard to make because when you are a backend technology provider, it's like selling a piece of commodity.

之所以这是一个困难的决定还因为,当作为后台技术提供商时，就像出售一件商品似的。

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If the goal is to improve education, then one has to ask hard questions Like does a technology actually help?

假如目标是提高教育，那就要问问这样的问题,技术真的有帮助吗？

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The barriers to unity presented by European geography and very limited technology made it hard for a would-be conqueror to create a vast empire, eliminating competitors and imposing his will over vast areas.

由于欧洲独特的地理条件,和当时有限的科技水平,使未来的征伐者很难建立一个广袤的帝国,清除异己和使他的意志,传播到广袤领地的每一个角落

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You know this, you can - it's hard to pick up a newspaper or a news magazine without hearing some new application of DNA technology.

你知道的,你-,随便翻一份报纸或杂志,上面很少没提到DNA技术的某个新应用

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