Therefore, the process feed, combustion air, and fuel gas should be preheated as much as possible before considering steam generation in the convection section.

因此，在考虑通过对流生产蒸汽之前，应尽量将过程原料、燃烧空气和燃料气进行预热处理。

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Experts agree that the next few decades will present a puzzle: how to feed nine billion people without wrecking the planet in the process.

专家们一致认为在未来几十年内将出现一个难题：如何在不破坏地球的情况下养活90亿人口。

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They feed on tiny things in sea water and help to keep the water clean in the process.

它们以海水中的微小物体为食，并在这个过程中帮助保持海水的清洁。

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The government announced plans for a complex tender process to determine the feed-in-tariffs for new deals, but has yet to provide details.

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Walking through his lab a decade ago, he had an epiphany: He envisioned an entire process by which he could feed corn sugar to lactobacilli that would exude ideal, highly concentrated lactic acid.

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Why do most broadcast television stations continue to resist using the free spectrum they hold to process digital content beyond their single feed of programming?

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