“frontier”的概念、定义、翻译、参考文献-科学参考

单词	frontier
释义	frontier [frǝn`tir ǝv ǝ `set] ^MATHEMATICS For a set in a topological space, all points in the closure of the set but not in its interior. Also known as boundary.
随便看	QCD Q factor Q fever Q machine Q-machine plasma Q magnitude Q meter Q multiplier Q point QPRK QPSK qr QRS complex qr tr Q signal QSO QSS Q-switched laser qt quad quadded cable quadded redundancy quad density quad in-line quadrangle

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