The bright nucleus is home to an older population of stars, which grow ever more densely packed toward the centre.

星云明亮的核心是老一代星体所在，越靠近中心密度越大。

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The research builds on previous work that used micro-bubbles to grow algae more densely and thus increase production.

这项研究建立在以往的工作之上——以前使用微气泡使藻类生长得更密集以此来提高产量。

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As computers grow increasingly powerful, computer chips are becoming more and more densely packed with transistors, the basic building blocks of microprocessors.

计算机变得日渐强大，组成计算机芯片的晶体管排列越来越紧凑。

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Planning is about balancing the need for a decent environment with business's need to grow, and the south-east of England is one of the richest and most densely-populated areas of the world.

ECONOMIST: Planning