立彬の日本語
現在その病気の原因は不明である。
tbd
At present, the cause of the disease is unknown.
956
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現在， 見在， げんざい
1. the present, present time, now
2. as of
3. present tense
4. this world, this life
5. to actually exist, to exist right now, to exist right in front of one
现在
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その， そん， 其の
1. that, the
2. part (as in "part two")
3. um ..., er ..., uh ...
那个；部分（如“第二部分”）
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原因， げんいん， げいいん
1. cause, origin, source
原因
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不明， ふめい
1. unclear, obscure, indistinct, uncertain, ambiguous
2. unknown, unidentified
3. ignorance, lack of wisdom, lack of insight
不明，不清楚；不知道
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である
1. be, is
是、=です、=だ
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题