形容词
中文翻译：额外的
同义词：
['excessive', 'excessively heavy']
例句：
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1.The extra-heavy snow made it difficult to travel on the roads.
额外的大雪使得在道路上行驶变得困难。
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2.The extra-heavy bag of groceries was too much for me to carry.
额外的重购物袋对我来说太重了，我拿不动。
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3.The extra-heavy weight of the backpack made me feel tired.
背包的额外重量让我感到疲惫。