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研究过程去年暑假某晚,我们同学几人相约在河边散步,偶然发现航道管理人员在更换航标的蓄电池。我们之中有人提出:能否开发出不用蓄电池的航标呢?我们3个人一拍即合,决定以此为课题开发研制出一种能
During the summer vacation last summer, some of our classmates walked along the river and stumbled across the channel management staff to replace the battery of the beacon. Someone among us proposed: Can we develop a navigation mark that does not use storage batteries? We, 3 people, hit it off and decided to develop a kind of energy for this subject.