Although there are several common causes for cloudy oil, this can be identified by taking a sampleof the oil and observing whether or not it clears up over time.
尽管油液呈云状有许多诱因，但只要取一份油液样本，然后一段时间后看油液中云状物是否消失。
2
I also heated a sampleof the Spanish oil more gently, to 300 degrees, to see whether it might retain more olive flavor.
我还在更柔和的300度下加热了一份西班牙油样品，想看看这样能否保留更多的橄榄风味。
3
It is recommended to analyse the oilsample for existence of metal particles.