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息を呑む， 息をのむ， 息を飲む， いきをのむ
1. to have one's breath taken away, to gasp (in surprise, wonder, etc.), to have one's breath catch in one's throat, to gulp
tbd
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
