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注意深く， ちゅういぶかく

1. attentively, cautiously, carefully, watchfully, with caution

小心地，谨慎地，留心地

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選ぶ， 撰ぶ， 択ぶ， えらぶ

1. to choose, to select

选，选择

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なければならない， なければなりません， なければいけない

1. have to do, must, should, ought to

必须，应该

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本， ほん

1. book, volume, script 2. this, present, current, ... in question, ... at issue 3. main, head, principal 4. real, genuine, regular, proper 5. counter for long, cylindrical things, counter for films, TV shows, etc., counter for goals, home runs, etc....

书

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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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