In case of symmetrical geometry of wire antennas or arrays with any voltage excitation, generalized even-odd mode expansion method can be used.
对于具有对称性的线天线或其阵列,不论激励电压如何,均可采用广义奇偶模展开。
Instead they may involve, at most, a little arithmetic, such as "the sum of two odd numbers is even", and common sense.
相反,它们最多可能涉及一点算术,比如“两个奇数之和为偶数”,以及常识。
Whereas we all know that the universe is of a certain kind-- -- we can't even call it Copernican anymore-- poetry has this odd preference for Ptolemaic astronomy.
虽然我们都知道宇宙是怎样的-,现在即使哥白尼的理论也不完全正确了-,但是诗歌偏爱托勒密的宇宙观。
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