形容词
中文翻译：Unknown
同义词：
['sluggish', 'lethargic', 'listless', 'unresponsive']
例句：
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2.
说话或行动
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3.
表情
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1. The team's performance was slack-jawed, lacking in energy.
团队的表现是松懈的，缺乏活力。
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2. His face was slack-jawed with shock at the news.
他震惊地呆滞着，面无表情。
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3. The scientist was slack-jawed when he heard the results of his experiment.
科学家听到实验结果时，呆滞地说不出话来。