The refined olive oil and two of three extra-virgin olive oils I tested began to smoke at a respectable 450 degrees.

我所试验的精制橄榄油和2/3的特级纯橄榄油在容许温度450度时冒烟了。

youdao

Olive oil and its fractions, whether or not refined, but not chemically modified.

油橄榄油及其分离品，不论是否精制，但未经化学改性。

youdao

"Pure" olive oil is made by adding a little extra virgin olive oil to refined olive oil.

纯橄榄油是添加了少量特级初榨橄榄油来精炼的橄榄油。

youdao

The researchers said that extra-virgin olive oil was used in the study because it contains more polyphenols, which have been shown to improve cholesterol levels, than refined olive oil.

WSJ: Mediterranean Diet of Olive Oil, Nuts, Reduces Heart Disease, Study Finds