动词短语
中文翻译：更硬的
同义词：
['tighter', 'firmer例句：1. The new shoes area bit stiffer than the old ones.（这双新鞋比旧鞋要硬一些。）2. He tightened the screwson the door to make it stiffer.（他拧紧了门上的螺丝，使门更坚固。）3. The car was stiffer than usual after the accident.（事故后，这辆车比平时更硬了。）']
例句：
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1. The new shoes area bit stiffer than the old ones.
这双新鞋比旧鞋要硬一些。
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2. He tightened the screwson the door to make it stiffer.
他拧紧了门上的螺丝，使门更坚固。
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3. The car was stiffer than usual after the accident.
事故后，这辆车比平时更硬了。