莱司特：吉姆，我们有一些品管的问题。我们必须找出问题根源并设法解决。
Lester: We're having some quality-control problems, Jim. We need to go to the source to work them out.
莱司特：吉姆，我们有一些品管的问题。我们必须找出问题根源并设法解决。
Lester: We're having some quality-control problems Jim. We need to go to the source to work them out.
内燃机油在中低温运行工况下容易产生油泥问题，一直是油品研制者关注并设法解决的对象。
The sludge forms easily while the engine oil runs at medium and low temperature, which has been a problem that the oil developers pay attention to and want to solve all along.
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