The M-ATVs are also a major logistical challenge. The Pentagon transports them by air in order to meet the high demand, adding a 10-percent premium to the vehicle's cost.

VOA: standard.2010.08.01

But there's a high demand within San Francisco to have an immersion program.

旧金山学校对双语教学的需求很大。

旧金山的公立教育 - SpeakingMax英语口语达人