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たちまち， 忽ち
1. in an instant, in a moment, immediately, right away, at once
2. suddenly, all of a sudden, all at once
转眼间，顷刻间，立刻，马上，当即；突然间，转眼间，霎时
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
