Those on lower income made eye contact with the person they were talking with and nod their heads more frequently signaling they were interested in what was being said.

而那些收入较少的人则与他们的交谈对象有更多的眼神交流，也会更频繁地点头示意他们对所谈论的事情感兴趣。

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Shell as used herein shall mean all pressure holding parts of the vessel in contact with the service fluid, including heads, nozzles, manholes and manhole covers.

这里的壁板指与系统介质接触的所有压力部件，包括封头、设备口、人孔及人孔盖板。

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In this paper, a simple method to measure the specific contact resistance of metal-semiconductor ohmic contact is developed, using the probe heads of the inline four probes.

本文提出一种用直线四探针头测量金属-半导体欧姆接触接触电阻率的简捷方法。

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And there has not been direct contact between the two heads of state.

WHITEHOUSE: Press Briefing

Past presidents, certainly since Ronald Reagan, went over the heads of the media to win over the people, to get them to contact Congress and push Congress to deal.

WSJ: Noonan: Obama Is Playing a New Game

When asked to choose one picture as his favorite, Souza selected one of the president and first lady softly butting heads in a freight elevator, surrounded by staffers who appear to be avoiding eye contact with the couple.

CNN: Official White House photographer gets inside view