To examine their depressive effect, these PPDs were used in hydrogenation base oil and paraffin base oil.

将所合成的降凝剂应用于加氢基础油和石蜡基基础油中，考察其降凝效果。

youdao

We obviously examine every issue when it comes to higher oil and gas prices.

WHITEHOUSE: Press Briefing

But the company's tie-up with BP focuses on another area: using the sequencing technologies that Venter has pioneered to examine the microbes that are found inside natural gas and oil wells.

FORBES: BP's Biotech Bet

But we have the capacity to act in case of a major supply disruption, and we are talking with international institutions and other -- and oil-producing nations to -- as we examine the developments in the markets.

WHITEHOUSE: Press Briefing