1·This article introduced in the first chapter the electric refrigerator system composition and the principle of work, the second chapter elaborated this control system hardware design part.
本文在第一章介绍了电冰箱的系统组成及工作原理，第二章论述了本控制系统的硬件设计部分。
2·It is hard to believe that automobiles, radios, motion pictures, frozen foods, electric refrigerator, to mention only a few items, have come into common use within thirty years.
且举几件东西来说吧，汽车、无线电、电影、速冻食品、电冰箱，这些东西在过去的30年中得到了广泛的应用，这简直令人难以置信。