It's hard to stay ahead of the game in network security when the landscape is constantly changing.

当形势不断变化时，在网络安全领域保持领先地位是困难的。

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The contours of the shift are still in flux, in part because there is so much uncertainty about the shape of the economic landscape and the job market ahead.

这个转变仍然在持续着，部分原因是因为有太多的不确定性的经济格局和就业市场的挑战。

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The map was drawn up by the World Resources Institute, South Dakota University and IUCN, for the Global Partnership on Forest Landscape Restoration ahead of the launch of the United Nations International Year of Forests 2011.

CNN: Forests size of Russia 'could be restored'

The Queen had been set to tour the museum's Australia Landscape exhibition ahead of her visit to the country next week.

BBC: Queen Elizabeth II

While many across the pond are happy with the status quo--or better yet are happy to join the massive corporate and government bureaucracies that dot the European landscape ahead of corporate and government pensions after early retirement--restless Americans in many instances want more than the status quo.

FORBES: Political Economy