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騒音， そうおん

1. noise, din

喧哗，嘈杂

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徐々に， 徐徐に， 除々に， 除除に， じょじょに

1. gradually, steadily, slowly, little by little, step by step, by degrees

慢慢地，渐渐地，一步一步地

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減少， げんしょう

1. decrease, reduction, decline

减少

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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

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する， 為る

1. to do, to carry out, to perform 2. to cause to become, to make (into), to turn (into) 3. to serve as, to act as, to work as 4. to wear (clothes, a facial expression, etc.) 5. to judge as being, to view as being, to think of as, to treat as, to use...

做，作，干，执行

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