例句與造句

1. She stopped at her mother's fireless cooker, a huge pot into which she put a big heated rock at night.
2. Some types were provided with soapstone or iron plates which were heated during the preliminary cooking on the stove and then placed in the fireless cooker either over or under the cooking pot.
3. In retirement, he  took a number of patents upon devices for making housekeeping easy, among which he improved oil and gas furnaces, a fireless cooker, and, during the last six months of his life, he was busy with a device for supplying hot water more quickly and more cheaply & . 
4. It's difficult to find fireless cooker in a sentence. 用fireless cooker造句挺難的