With phosphorus costing the equivalent of several hundred pounds per ounce, the matches were expensive.
With phosphorus costing the equivalent of several hundred pounds per ounce, the matches were expensive.
由于磷几百磅一盎司，所以火柴非常昂贵。
With phosphorus costing the equivalent of several hundred pounds per ounce, the matches were expensive.
由于磷几百磅一盎司，所以火柴非常昂贵。