劣势：机械结构复杂；微型发动机在美国市场销路不好。
Cons: Mechanical complexity; tiny engines are a hard sell in the U.S. market.
照明装置还可以是其它结构，光源也可以是微型灯泡。
The lighting device can be other structure as well, with a micro-bulb light source.
照明装置还可以是其它结构，光源也可以是微型灯泡。
The lighting device can be other structure as well, with a micro-bulb light source.
应用推荐