Taken together, Hanke says, these and other factors have made for a "perfect storm" that relentlessly drives up oil prices with no end in sight. 汉克说，从综合方面来看，这些及其他因素构成了一个完美的风暴，推动是由价格不断上升，而且没有上限。
And yet, unique as this relationship between two countries may be, it is also shaped by general factors which define the challenges facing humanity as our century draws to a close. 尽管两国人民的关系是独一无二的，仍由一些普通因素构成，这些因素在本世纪即将结束时明确了人类面临的各种挑战。
