And make no mistake: these challenges loom large, because Google's dominance of the Internet landscape is increasingly being threatened by Facebook's rise.

而且，毫无疑问的是：这些挑战已赫然在望，因为Facebook的崛起正日益威胁谷歌公司在互联网的统治地位。

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The landscape diversity index of study area was low and the proportion of landscape types was uneven. Other green space landscape had the major dominance index.

城市绿地中面积最大、作为城市绿地主体的是以风景名胜区、水源保护区、郊野公园、森林公园、农林植被等为主的其他绿地。

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