A brown coal, a high-volatile bituminous coal and a low-volatile bituminous coal were pyrolysed at a slow heating rate in a thermogravimetric analyser.

在热天平上采用慢速升温制备了褐煤、高挥发分烟煤和低挥发分烟煤的半焦。

youdao

We are experiencing a potential risk of similar setback at moment due to recent high and volatile food prices.

由于近期居高不下和不断波动的粮食价格，我们很可能遭遇类似的挫折。

youdao

Clearly today, these countries still face significant risks from high and volatile food prices, climate change and conflict.

很显然，这些国家目前仍面临食品价格居高不下和波动、气候变化和冲突等引发的重大风险。

youdao

Bernanke also said there is "significant" risk that inflation could become a self-fulfilling prophecy if high headline inflation--which includes volatile energy and food prices--remains high, as people will simply come to expect higher prices.

FORBES: Fed Grows Worried About Inflation

"People who are investing in the fund understand that it is a high-risk, very volatile fund, " he said on the conference call.

FORBES: Early Retirement Or Early Warning?

Many of the issues that Ford says caught it by surprise--gas and commodity prices, for example--were high and volatile from the outset.

FORBES: Which Way Is Forward?