Houses built before 1939 use about 50% more energy per square foot than those built after 2000, mainly due to the tiny cracks and gaps that expand over time and let in more outside air.

1939年以前建造的房屋每平方英尺消耗的能源比2000年以后建造的房屋多50%，这主要是由于微小的裂缝随着时间的推移而扩大，更多的外部空气进入了裂缝。

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The problem is sure to expand over the coming years as users replace their boxy CRT monitors with LCD flat panel displays.

今后，随着使用者将箱型的阴极射线管屏幕换成液晶平面显示屏，这个问题将日益突出。

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Such a crack may expand over a long period of repeated lock and unlock operations, and eventually the lock bar could break.

这样的打击可能扩大了一个长期的反复锁定和解锁操作，并最终锁定栏可以打破。

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And what we are going to do over the next couple of month is expand on these-- most importantly, see how we can take the research, the rigor and apply it to our lives.

我们将在未来两个月,扩展这些前提-,最重要的是如何将研究，原则运用于生活。

哈佛公开课 - 幸福课课程节选

It will be limited in the initial phase, but it will expand over time.

WHITEHOUSE: Press Briefing on NATO Defense Capabilities

The "Music Unlimited powered by Qriocity" catalogue will initially offer about six million songs and will continue to expand over time.

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One problem is that this hospitable zone can shrink or expand over the lifetime of a star, as its energy fluctuates.

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