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教室， きょうしつ
1. classroom, lecture room
2. department (in a university)
3. class, lessons, course
4. school (for a particular discipline), teaching establishment
教室；课程
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駆け込む， かけ込む， 駆けこむ， 駈け込む， 駆込む， 駈けこむ， かけこむ
1. to run into, to rush into
2. to (run and) seek refuge in, to take shelter in
tbd
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
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
tbd
