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Glacier has a narrow spectrum on TM5, 7 bands, but moraine and snow and ice are different in evidence, therefore, TM5, 7 are advantageous bands for extracting glacier information.

冰川在TM 5、7波段光谱值范围窄，且冰碛与冰雪有明显的光谱差异，是冰川信息提取的有利波段。

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Construction projects, often of enormous size and impact, are developer generated and initiated, within a narrow spectrum of private interest, and the bigger they are the better the city seems to like them.

WSJ: New York Stadium Deals: Good and Bad

And of course the performances -- by Bogie, Bacall or even Alan Ladd -- were models of mysterious force within a narrow dramatic spectrum.

WSJ: 'Ice Age' Is Slick, but Plot Is Perilously Thin

What we need is Congress to get to work, to agree to compromise, to agree to do the work of the American people, instead of satisfying some narrow slice of the political spectrum, so that we can reduce our deficit in a responsible way that does not heap the burden on single -- small segments of society.

WHITEHOUSE: Press Briefing