Using the modified MASS model and terrain data of Liaoning, the effect of terrain on diurnal variation of the wind field in the ground layer is simulated.

利用修改的Mass模式和辽宁地区的地形资料，模拟了地形加热作用对辽宁地区近地层风场日变化的影响。

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However, the 3d visualization of terrain on the Internet is a big challenge for a low bandwidth user, because mass data needs to be translated on the Internet.

然而地形在网络上的三维可视化对于低带宽的用户来说是一项巨大的挑战，因为大量的数据需要在网络上传输。

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The likes and dislikes towards the beauty and the ugly much reflected the mass unconsciousness aesthetic psychology of the people from different tradition, culture, nationality and terrain background.

对“审丑”与“审美”的好恶在很大程度上反映了不同传统文化、不同的民族和不同地域背景下的人们的集体无意识审美心理；

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The 1880s saw a shift from Nordic skiing (cross-country skiing), to Alpine skiing (downhill skiing), because the adrenaline rush of gliding down a mountainside had more mass appeal than skiing across level terrain.

BBC: Where did skiing come from?

This is further helped by their terrain, which at first sight appears to be a tangled mass of mountains and hills running irregularly in all directions, but is actually hemmed in by well defined ranges on the outer periphery that make penetration of the area difficult.

BBC: Profile: South Waziristan