The blade is a key component for wind turbine to receive the wind energy.
风力机叶片是风力机接收风能的关键构件。
The oil security is important component of the national economy security and the energy security.
石油安全是一个国家经济安全和能源安全的重要组成部分。
The oil security is important component of the national economy security and the energy security.
石油安全是一个国家经济安全和能源安全的重要组成部分。
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