A long stretch of boring darkness ensued, during which some ripples began to ruffle the otherwise smooth fabric of space.

接着，是一个长长的沉闷的黑暗延伸时期，在这个过程中，一些小小的涟漪开始划过宇宙这平滑的幕布。

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A key discovery was that if the inside of the mask is smooth - even if the outside is bumpy with pores, a nose and other features - it will stretch over most faces and move with facial muscles.

最关键的发现是，如果面具内部平滑，即使外面的气孔，鼻子和其它部位凹凸不平，它也会在面部伸展，随着肌肉的伸缩而移动。

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H-P will build the new system in modules that can be rolled out sequentially, which should smooth the transition and stretch out the payments.

惠普将以可连续大批量生产的模块建造这个新系统，这将令系统的转接更为顺畅。

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Such expansion would stretch space and smooth matter, while leaving small density variations that show up in the CMB.

BBC: The observable Universe and beyond