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火がつく， 火が付く， 火が点く， ひがつく
1. to catch fire, to be ignited, to ignite, to light (e.g. of a match)
2. to flare up (of an emotion, controversy, etc.), to blaze, to be ignited (of a dispute, commotion, etc.), to take off (of a boom, craze, etc.)
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
