倍數(shù)表達法有三種：
倍數(shù)＋原級 倍數(shù)＋比較級 倍數(shù)＋名詞短語
例如:和---三倍一樣長
1.three times as long as
2.three times longer than
3.three times the length of
再如：和---四倍一樣寬
1.four times as wide as
2.three times wider than
3.three times the width of