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大変， 大へん， たいへん
1. very, greatly, terribly, awfully
2. immense, enormous, great
3. serious, grave, dreadful, terrible
4. difficult, hard, challenging
5. major incident, disaster
非常、极其、非常严重、极其糟糕；巨大、庞大；严重、严峻、可怕、糟糕；困难的、艰难的、具有挑战性的；重大事件、灾难
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早い， 速い， 疾い， 捷い， はやい
1. fast, quick, rapid, swift, speedy, brisk, prompt
2. early, soon, earlier than usual
3. premature, too soon, too early
4. easy, simple, quick, fast
5. as soon as ..., the moment ..., the instant ...
快、迅速；早，比平时早
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
