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やあ

1. yo!, hello there!, hi! 2. wow!, oh!, ah! 3. yah! (yell)

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景気， けいき

1. business conditions, the market, economic activity, economic climate 2. good (economic) times, prosperity, boom 3. liveliness, energy, vigour, vigor, spirit

tbd

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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

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どう， 如何

1. how, in what way, how about

如何

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が

1. indicates the subject of a sentence 2. indicates possession 3. but, however, (and) yet, though, although, while 4. and 5. used after an introductory remark or explanation 6. regardless of ..., whether ... (or not), no matter ... 7. indicates a des...

tbd

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