名词
中文翻译：Unknown
同义词：
['external varnish', 'exterior paint', 'exterior coating']
例句：
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1. Theexterior varnish on the wooden door is peeling off.
木制门上的外层油漆正在脱落。
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2. The company applied a new external varnish to protect the building from weathering.
该公司给建筑物涂上了新的外层涂料，以保护其免受风化。
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3. The painter used an exterior varnish to give the wall a smooth finish.
画家使用外层涂料给墙面一个光滑的外观。