单词：incombustible mixture
incombustible mixture的用法和样例：
例句
- Any purge method should be repeated as often as required to be certain a flammable mixture cannot be formed upon introducing hydrogen or air to the system.任何净化方法都应该尽量多重复几次，直到确定在把氢或空气引入系统时不会形成可燃混合物为止。
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闭着眼睛飘单词 四级词汇