Theoretical interpretation of sea surface emission signatures provides the potential possibility to facilitate ocean wind vector retrieval using purely passive means.

风成海面的极化辐射特性提供了利用被动微波遥感手段反演海洋风场的途径。

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This means that active learners raise questions on information that they read and hear, while passive learners accept both the printed page and the words of their professors as "truth".

这意味着主动学习者会对他们所读到和听到的信息提出问题，而被动学习者则会将书本和教授的话都视为“真理”。

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In their minds, training means passive learning.

他们以为培训仅仅是被动式的学习。

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The passive feature means they rely less on electrically driven pumps and valves, for safety, and more on systems designed to shut down plants safely in emergencies and to prevent operator error.

WSJ: Nuclear Industry Likely to Reassess Safety Systems

"Passive solar" means using windows or other materials in an energy-conscious way, not solar panels.

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By saving that salary and investing, Johnson earned far more money through passive income than by active means.

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