立彬の日本語
９０の約数のうち、９でわり切れない数は何個あるでしょうか。
tbd
Among the divisors of 90, how many numbers are not divisible by 9?
281
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約数， やくすう
1. divisor, factor, measure
tbd
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割り切る， 割切る， わりきる
1. to find a clear solution, to come to a clean decision, to give a clear explanation, to reason out, to conclude, to be pragmatic, to be practical
2. to divide exactly (without remainder), to divide evenly
tbd
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何個， 何箇， なんこ
1. how many pieces
几个(？)
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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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でしょうか
1. don't you think?, indicates question
tbd
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
で
1. at, in
2. at, when
3. by, with
4. within, in
5. and then, so
6. and, then
7. let me tell you, don't you know
表示范围
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
