当前分类下找不到" Students+in+the+program+learn+to+use+computer-aided-drafting+(CAD)+to+design+a+photovoltaic+system,+they+learn+about+the+sorts+of+issues+that+come+up+when+designing+such+a+system,+and+they+learn+about+the+installation+and+maintenance+of+such+systems.+"的例句。