It is difficult to determine the effects of straw-break surface on the structure of drifting sand current and the wind speed profile in the sand-moving region due to the complexity of straw-breaks.

由于草方格构成的下垫面复杂多变，其对风沙流结构与风沙活动层风速廓线的影响很难确定。

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Scanning electron microscopy was used in characterizing film's break surface and results showed that section without cross-linking modification was smooth, and the modified section was very rough.

通过扫描电镜对胶膜断面进行了表征，未经交联改性的断面很光滑，而经改性后的断面就很粗糙。

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"We know that surface use of dispersants decreases the environmental risk to shorelines and organisms at the surface and we know that dispersants break down over weeks rather than remaining for several years as untreated oil might."

VOA: standard.2010.05.18

This type of tag, however, requires a buoy to carry the aerial, and this is attached to the shark by a ten-metre-long line. (The line is needed because the sharks themselves rarely break the surface, and the transmitter cannot signal to the satellite from under water.) Two American biologists, Scott Eckert and Brent Stewart, from the Hubbs-Sea World Research Institute in San Diego, have had some success with satellite tracking.

ECONOMIST: Whale sharks

It is possible that larger seeps at different times and locations might in fact be vigorous enough to break through the ocean surface.

BBC: Methane seeps from Arctic sea-bed

Where the rainbow fringes become most tightly spaced is where the fault break came closest to the surface, although the data indicates the fault is unlikely to have broken right through to the surface.

BBC: Christchurch quake mapped from space