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世界， せかい

1. the world, society, the universe 2. sphere, circle, world 3. world-renowned, world-famous 4. realm governed by one Buddha, space

世界

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石油， せきゆ

1. oil, petroleum 2. kerosene, paraffin

石油

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新しい， 新らしい， あたらしい

1. new, novel, fresh, recent, latest, up-to-date, modern

新的

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エネルギー源， エネルギーげん

1. energy source

tbd

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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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開発， かいはつ， かいほつ

1. development, exploitation (of resources)

开发

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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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ある， 有る， 在る

1. to be, to exist, to live 2. to have 3. to be located 4. to be equipped with 5. to happen, to come about

有，存在；有，拥有；发生；位于；配备

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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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の

1. indicates possessive 2. nominalizes verbs and adjectives 3. substitutes for "ga" in subordinate phrases 4. (at sentence-end, falling tone) indicates a confident conclusion 5. (at sentence-end) indicates emotional emphasis 6. (at sentence-end, risi...

句尾起强调作用；助词，表示所有关系

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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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