oil pierces the $70-a-barrel barrier and natural gas prices quadruples ever since the late 1990s. 4

Question

oil pierces the $70-a-barrel barrier and natural gas prices quadruples ever since the late 1990s. 4563 什么意思？

Answer 1

油价突破70美元每桶、天然气价格从20世纪90年代末涨了四倍。

Answer 2

油价刺穿70美元桶的障碍和天然气价格四倍自从20世纪90年代末