Hess suggested that the presence of water, probably released from minerals decomposing in the Earth's mantle, might have meant that a high-magnesium magma could have existed at a lower temperature.

赫斯认为，水的存在可能是由地幔中分解的矿物质释放出来的，这可能意味着含镁高的岩浆可能在较低的温度下存在。

youdao

While the simple presence of these chemicals does not necessarily indicate a health risk, the fact that typical Americans carry these chemicals at all shocked June and his fellow participants.

虽然这些化学物质的简单存在并不一定表明存在健康风险，但典型的美国人身上携带这些化学物质的事实让琼和他的同事感到震惊。

youdao

And while the simple presence of these chemicals does not necessarily indicate a health risk, the fact that typical Americans carry these chemicals at all shocked June and his fellow participants.

虽然这些化学物质的简单存在并不一定表明存在健康风险，但典型的美国人身上携带这些化学物质的事实让琼和他的同事感到震惊。

youdao

It was enough to be in the presence of this great anchor I so admired, and to realize he was not above having a beer at the end of a very long broadcast with low-level support people.

VOA: special.2009.08.16

That's a real opportunity that your presence and presence of Muslim students at Princeton allows the rest of the population as well as each of the traditions.

你以及穆斯林学生的存在,都为其他的学生和宗教传统,提供了机会。

普林斯顿公开课 - 人性课程节选

Iranian and U.S.diplomats were aware of one another's presence at the Moscow conference, but said it is not unusual for them to attend the same international forums.

VOA: standard.2009.03.27

Previous missions, notably the Viking landers in the 1970s, have hinted at the presence of organics on Mars.

BBC: Gale Crater: Geological 'sweet shop' awaits Mars rover

The Nobel Peace Prize-winning activist, Tawakul Karman, is also boycotting the dialogue in protest at the presence of officials who served under Mr Saleh during his 33 years in power.

BBC: Yemen national dialogue conference begins

Instead, the men told me that the Taliban are people motivated by religion, anger at corrupt police and local officials and affront at the presence of foreign, non-Muslim soldiers in their midst.

BBC: UK troops launch Operation Tor Shezada in Afghanistan