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必要， 必用， ひつよう

1. necessary, needed, essential, indispensable 2. necessity, need, requirement

必要的，必需的，必不可少的，不可缺少的；必要性，需要，要求

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変更， へんこう

1. change, modification, alteration, revision, amendment

变更

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を

1. indicates direct object of action 2. indicates subject of causative expression 3. indicates an area traversed 4. indicates time (period) over which action takes place 5. indicates point of departure or separation of action 6. indicates object of d...

表示动作的直接对象；表示经过的场所；表示离开或分开的点

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加える， くわえる

1. to add, to add up, to sum up, to append, to annex 2. to increase, to gather (e.g. speed), to pick up 3. to include, to count in, to let join 4. to inflict (damage), to deal, to give

补充、加总、归纳、追加、附加；增加、获取(如速度)、拾取；造成(伤害)、处理、给予

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彼， かれ

1. he, him 2. boyfriend

他

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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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