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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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陥る， 落ち入る， おちいる
1. to fall into (e.g. a hole)
2. to fall into (chaos, depression, dilemma, illness, etc.)
3. to fall into (a trap, etc.)
4. to fall, to surrender, to capitulate
掉进（例如一个洞里）；陷入（混乱、抑郁、困境、疾病等）；落入（陷阱等）
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
