形容词
中文翻译：额外的
同义词：
['excessive', 'excessively heavy例句：1. The extra-heavy snow made it difficult for us to walk.（额外的大雪使我们难以行走。）']
例句：
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1. The extra-heavy snow made it difficult for us to walk.
额外的大雪使我们难以行走。
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2. The extra-heavy load on the truck caused it to overturn.
卡车上的额外重载导致它翻车。
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3. Extra-heavy rain caused flooding in the city.
额外的大雨使城市发生洪水。