internal label的用法和樣例：
例句
- Weakness of trace impouring imprecisely was avoided by mixing UDMH and internal standard solution.
用內標與偏二甲肼混合樣品，避免了微量進樣不準確的缺陷。 - Besides, quantitation analysis of involatile compositions in beer could be done by internal standard method or by external standard method.
還可用內標法和外標法對啤酒中的不揮發組分進行定量檢測分析。
