立彬の日本語
専門家だけあって彼はその分野に詳しい。
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As may be expected of an expert, he's well versed in the field.
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専門家， せんもんか
1. specialist, expert, professional, authority, pundit
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だけあって
1. as one would expect from ..., given that ... (naturally ...), because ..., being ...
2. for good reason, there is a (good) reason that ...
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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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分野， ぶんや
1. field, sphere, realm, division, branch
领域，范围，分支
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詳しい， 精しい， 委しい， くわしい
1. detailed, full, minute
2. knowing very well, knowledgeable (about), well-acquainted (with), well-informed (about), familiar (with)
详细；了解，精通，熟悉
彼， かれ
1. he, him
2. boyfriend
他
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题
に
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), for, with
5. by, from
6. as (i.e. in the role of)
7. per, in, for, a (e.g. "once a month")
8. and, in addition to
9. if, although
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