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蒸気， 蒸汽， じょうき
1. steam, vapour, vapor
2. steamboat, steam locomotive
tbd
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変わる， 変る， かわる
1. to change, to be transformed, to be altered, to vary
2. to move to
3. to be different, to be uncommon, to be unusual
改变，变化
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