The physical meaning and characteristic of reference frame power are illustrated in detail.
推导了功率表达式，阐明了参考坐标系功率的物理意义和特性。
Because different zinc metal have different physical and mechanical characteristic, we can design cast optionally.
不同的锌合金有不同的物理和机械特性，这样为压铸件设计提供了选择的空间。
The characteristic finding on physical exam is a mid-systolic click.
体格检查时发现的收缩中期期卡嗒音为其特征表现。
The characteristic finding on physical exam is a mid-systolic click.
体格检查时发现的收缩中期期卡嗒音为其特征表现。
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