非线性系统的故障诊断是该领域的热点与难点问题。
The diagnosis in the nonlinear systems is the hot and difficult subject in this field.
高效而可靠的风力发电机的研究与开发已经成为能源技术领域的热点和难点。
R&D of wind turbines has been a hot and difficult point in energy technology field.
高效而可靠的风力发电机的研究与开发已经成为能源技术领域的热点和难点。
R&D of wind turbines has been a hot and difficult point in energy technology field.
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