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たまたま， 偶々， 偶偶， 偶， 適

1. by chance, by accident, accidentally, happen to (be, do), unexpectedly, casually 2. occasionally, once in a while, now and then

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その場， 其の場， そのば

1. there, the spot, the place, the occasion, the situation 2. then and there, on the spot, immediately, at once, impromptu

tbd

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居合わせる， 居合せる， 居あわせる， いあわせる

1. to happen to be present

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彼ら， 彼等， かれら

1. they, them

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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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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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