It is found that the potential of the tower system is composed of two components, that are, the variable offset potential and the constant potential caused by unipolar charges of the lightning.
研究发现杆塔电位包括可变的抵消分量和雷电单极电荷引起的恒定分量两部分。
We can use another form of variable expansion to select a specific substring, based on a specific character offset and length. Try typing in the following lines under bash.
可以根据特定字符偏移和长度，使用另一种形式的变量扩展，来选择特定子字符串。
With others, like the variable-speed chilling devices and lighting, there was an offset to be considered in the immediate investment of capital.
其他一些，像变速的冷却设备及照明等，则可弥补未考虑进直接基建投资的不足。
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