例句與造句

1. Others, such as mechanically powered flashlights, have the generator integrated within the device itself.
2. Since they are always ready for use, mechanically powered flashlights are often kept as emergency lights in case of power outages or other emergencies.
3. An alternative to rechargeable batteries for electricity storage is supercapacitors, now being used in some devices such as the mechanically powered flashlight shown here.
4. It's difficult to find mechanically powered flashlight in a sentence. 用mechanically powered flashlight造句挺難的