形容词
中文翻译：未被金属化的
同义词：
['unalloyed', 'unalloyed']
例句：
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1. The road was unmetalled, making it difficult to drive on.
这条路未经金属化，使得驾驶困难。
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2. Themetal detectors were unmetalled, so they couldn't pick upthe hidden treasure.
这些金属探测器未经金属化，所以无法探测到隐藏的宝藏。
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3. The unmetalled road madeit easy for us to walk through theforest.
未经金属化的路让我们很容易穿过森林。