Others believe he was sent to assess the gravity of the situation facing the Castro brothers' most important ally (Cuba depends on Mr Chavez for subsidised oil).

多数成员相信，他是被派来就近了解卡斯特罗兄弟最重要战友(古巴仰赖Hugo chavez取得较便宜的石油)面对情势的严重性。

youdao

Not only does a gross gravity separation of gas and oil occur within a reservoir but more subtle variation may also exist.

储层不仅有气和油的总重力分离出现，而且还存在更加微妙和复杂的变异。

youdao

A vertical or horizontal metal separator that USES gravity to separate water, gas, and oil.

利用重力分离水、气和油的立式或卧式金属分离器。

youdao

Steam Assisted Gravity Drainage (SAGD) pumps steam into the ground to liquefy the bitumen and stiff crude oil, making it thin enough to be pulled out of the ground.

FORBES: Has The Gulf Spill Opened Pandora's Box For Obama?