“Canada balsam”的概念、定义、翻译、参考文献-科学参考

单词	Canada balsam
释义	Canada balsam [´kan·ǝ·dǝ `bȯl·sǝm] ^MATERIALS A transparent balsam useful for cementing together lenses and other optical elements because its index of refraction is in the same range as that of glass.
随便看	sigma field sigma finite sigma function sigma hyperon sigma-minus hyperonic atom sigma phase sigma pile sigma ring sigmaspire sigma-T sigmatron sigmatropic shift sigmoid sigmoidal dune sigmoidal fold sigmoid colon sigmoid distortion sigmoiditis sigmoidoscope sign signage signal signal area signal bias signal carrier

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