Since August2005, when visits to an Eritrean village prompted him to research global access to artificial light, Mark Bent,49, a former foreign service officer and Houston oilman, has spent$250,000 to develop and manufacture a solar-powered flashlight.是什么意思_Since August2005, when visits to an Eritrean village prompted him to research global access to artificial light, Mark Bent,49, a former foreign service officer and Houston oilman, has spent$250,000 to develop and manufacture a solar-powered flashlight.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句