These, though hard to monitor, could mean a lot if they work.

尽管很难监督这些承诺，但是如果承诺能够兑现，则意义深远。

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However, the home school Legal Defense Association says the percentage of black home-schooling families has increased, though hard Numbers weren't available.

然而，家庭学校法律辩护协会称，让孩子在家“上学”的黑人家庭比例有所提高，但目前还无法得到相关的确切数字。

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Labour represents around 70% of Japanese business costs: though hard on individuals who are sacked, the rise of non-regular workers has let firms cut costs fast.

劳动力成本约占到日本商业总成本的70%：虽然对被解雇的人有些残酷，非正式工的增加让企业能更快地削减成本。

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Even though a hard drive spins at 7200 times per minute or even faster, that's relatively slower than the speed of light.

即使一个硬盘驱动器的转速达到每分钟7200次,甚至更快，仍然比光速慢。

哈佛公开课 - 计算机科学课程节选

That's really hard to do though, you know.

但这真的很不容易做。

想成为配音演员 - SpeakingMax英语口语达人

We are also put in mind of how the war is, in fact, anything but a revel, though it, too, may have been provoked by a cause as insignificant and hard to trace as "some wizard vermin."

我们同样也思考事实上战争，只是一场狂欢，尽管它有可能,是由一个毫不重要难以追踪的“一些害虫“引起的“

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That's a huge win during the testing cycle, though hard to replicate in the real world.

WSJ: 2013 Ford C-Max Hybrid Review: A Fine Car Falls Way Short on MPG | Rumble Seat by Dan Neil

Dr Kabamba, though hard up, enjoys the respect that doctors receive in all societies.

ECONOMIST: The poor: The mountain man and the surgeon | The

Most of its main British rivals are also thought to be unprofitable, though hard data are scarce.

ECONOMIST: Online grocers