fall back upon短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 有…可以依靠 I must fall back upon what I said previously. 我必须言归正传。《21世纪大英汉词典》 But there now followed an unfortunate interval of wet weather, during which she was obliged to fall back upon her sovereigns. 但是现在到了倒霉的雨季，在这期间，她只好动用她剩下的那些金币了。 ebigear