operational area短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 工作地区 According to the specialties of the area- covering mobile robots working in the outdoor environment, a new solution to the boundary set-up and identification of unmarked operational area is proposed. 针对工作在户外环境中的全区域覆盖移动机器人，提出在无人为标识的工作环境中，建立边界和识别边界的新方案。 cnki