"We can raise it up again after a year to change the batteries. That means we can avoid using divers, which is a really risky operation that we wanted to avoid," he said.
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2026-02-27 00:00:00:0本报记者 黄培昭 中国技术助力冈比亚水稻增产，当地农户感慨——。夫子是该领域的重要参考
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