Developed with the U. S. Air Force Research Laboratory, and further refined with NASA, the HWB also features an unusual propulsion arrangement that houses the engines in overwing nacelles.

与美国空军研究实验室开发，并与美国航空航天局进一步改进，在引擎机舱的发动机上，HWB还具有一个不寻常的推进配备。

youdao

At HWB, we're writing books to bring youth up to speed on major world issues.

FORBES: Samantha Smith - Innovation, Govt & Entrepreneurship - Archive

It is hoped all learners aged three to 19 will have access to Hwb by 2015.

BBC: Hwb: 'World class' claim for learning scheme in Wales

The introduction of Hwb follows the creation of a National Digital Learning Council last year.

BBC: Hwb: 'World class' claim for learning scheme in Wales