two hierarchys的用法和樣例：
例句
- He was my senior at Yale by two years.
他是耶魯大學比我高兩級的學生。 - There are two steps up onto the bus.
上公共汽車有兩級踏板。
two hierarchys的相關資料：
臨近單詞
two unit
two
two thousand seven hundred and ninety eight
two -dimension trajectory correction fuze
two thousand seven hundred and twenty seven
two thousand seven hundred and twenty eight
two thousand three hundred and ninety seven
two thousand three hundred and thirty eight
two thousand eight hundred and seventy four
two thousand eight hundred and seventy nine
two-dimensional dual-threshold Otsu law
two-dimensional discrete cosine transform
