The rest must be secured by a mixture of diplomacy, pipeline investment, a national strategic oil reserve and, as Mr Churchill said, a variety of sources. Xref Environment warning,

• 要想确保其余部分的石油供应,则必须采取综合手段,包括外交途径、输油管道投资、国家战略石油储备,像丘吉尔先生说的来源多样化。