英语翻译
谁能帮我翻译一下这段话~
是关于石油的~
一定得听得懂`
不要什么翻译软件之类的~我自己已经试过了~
US Gulf Coast (USGC),North West Europe (NWE - Rotterdam) and Singapore.
In each case they are based on a single crude oil appropriate for that region and have optimized product yields based on a generic refinery configuration (cracking,hydrocracking or coking),again appropriate for that region.
The margins are on a semi-variable basis,ie the margin after all variable costs and fixed energy costs.