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单词
thermionic tube
释义
thermionic tube
n.
(名词)
An electron tube in which the source of electrons is a heated electrode.
热离子管:电子源是加热电极的电子管
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phytochromes
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phytohemagglutinin
phytohormone
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phytolith
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更新时间:2026/3/13 7:45:10