这些统计数据勾勒出了一些较为明显的趋势：Facebook已成为主要公司，Twitter受人追捧，Wordpress 和 Mozilla继续推波逐浪。
These statistics show some relatively obvious trends: Facebook is a major major player now, Twitter is hot stuff, and Wordpress and Mozilla continue to make waves.
当浮力把空气向上推，而重力又把它向下拉的时候，就会形成大气的重力波。
Atmospheric gravity waves form when buoyancy pushes air up, and gravity pulls it back down.
在整个计算过程中，波场外推是最为重要的环节。
Extrapolating wave field is most important in the whole process.
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