The students in the village petitioned the authority for a new playground.
村里的学生恳求当局修建一个新操场。
These facilities could be the “playground” for graduate students, research scientists and engineers to carry out the necessary trial-and-error tests before a fully functional farm emerged.
这些模型可以作为研究生、相关领域科学家和工程师开展试错检测的“练兵场”，之后再推广功能完善的农场。
Newly built school playground The school does not have playground; students have to go about 1 kilometer for PE class.
《新建的学校操场》学校没有操场，学生的体育课要到1公里外的新建操场上课。
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