After three years of working in a petrol station and doing unpaid work I still hadn't managed to get an entry level job.
在加油站干了三年无薪工作之后，我仍然没能找到一份入门级的工作。
2
With lead and MTBE additives now phased out, spiking petrol with a small amount of ethanol raises its octane level enough to prevent the engine from "knocking" under load.
As oil prices rise, ethanol starts to be competitive again (as a rule of thumb, ethanol is profitable when petrol costs $3 a gallon in America, a level it has just reached in California).