This paper investigated expansion property that common Portland cement was as basic body and cement Q phase - C2S - C4AF - C12A7 as expansion age nt with a little addition of gypsum.

采用普通硅酸盐水泥作为基体、Q相- C2S - C4AF - C 12a7水泥作为膨胀剂、加入少量石膏的条件下进行试验研究。

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Note that the present age of the universe follows from the expansion history and present expansion rate.

请注意，目前的宇宙年龄是由宇宙当前的膨胀速率所估计的。

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Keck is helping astronomers determine the age of the universe and its expansion rate as well as allowing them to watch the birth of stars in other galaxies.

凯克能帮助天文学家探测宇宙的年龄和膨胀的速度，并观测其他星系中恒星的诞生。

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It can also tell us about the rate of expansion and age of Universe - and the ultimate fate of the Universe.

BBC: Pictures of the early Universe

Or is it an outdated holdover from an age when conquest and military expansion were more admired than they are now?

FORBES: Two Great Historians On Alexander the Great, Part One

It's likely some of that expansion has to do with the ever shrinking age of cell phone adoption.

FORBES: An 'Incredible' Marketing Ploy