名词
中文翻译：Unknown
同义词：
['sadder', 'more serious', 'more solemn', 'more severe', 'stricter', 'sterner']
例句：
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1. The weather has gotten grimmer by the day.
天气一天比一天更糟糕。
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2. The teacher was grieving over the loss of his beloved dog.
老师因为失去心爱的狗而感到悲痛。
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3. She is grieving for her lost love.
她正在为失去的爱情而悲伤。