立彬の日本語
Ｘ記号は数学ではたいてい未知数を表す。
tbd
The symbol "x" usually stands for an unknown quantity in mathematics.
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記号， きごう
1. sign, symbol, mark
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数学， すうがく
1. mathematics
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たいてい， 大抵， 大てい
1. mostly, ordinarily, usually, generally
2. probably
3. most, almost all
4. ordinary
5. proper, appropriate, moderate
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未知数， みちすう
1. (an) unknown, unknown number, variable
2. unknown quantity, not yet known
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を
1. indicates direct object of action
2. indicates subject of causative expression
3. indicates an area traversed
4. indicates time (period) over which action takes place
5. indicates point of departure or separation of action
6. indicates object of d...
表示动作的直接对象；表示经过的场所；表示离开或分开的点
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
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
