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今日， きょう， こんにち， こんち， こんじつ
1. today, this day
2. these days, recently, nowadays
今天
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たいそう， 大層， 大そう
1. very, extremely, exceedingly, greatly, terribly
2. extreme, excessive, great many, large number of
3. splendid, impressive, tremendous, immense
4. exaggerated
tbd
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冷える， ひえる
1. to grow cold (from room temperature, e.g. in refrigerator), to get chilly, to cool down
冷、变冷、冷起来
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
