Severe deposit build-up caused an existing well to lose production within days of being brought online.

一口生产井发生了严重的沉积物聚集，导致在投入生产后的几天内就丧失了产能。

youdao

An existing well provides water for the house, and a small solar electrical system sits away from the house to provide for basic electrical power use.

现有水井为房屋供水，一个小型太阳能电力系统位于远离房屋的地方，提供基本的用电。

youdao

For instance, new technologies that are building upon existing technology have not found their footing well enough to appeal to a mass audience.

例如，建立在现有技术基础上的新技术还没有建立足够的基础来吸引大众。

youdao

They were asked about their diet and day-to-day activities, as well as any pre-existing diseases.

VOA: special.2010.06.30

Because if B was just another word for, another way of talking about, A, then to imagine A existing but B not existing would be imagining A existing but-- well, B is just A--A not existing.

因为如果B只是,A的另一种表达方式,那么认为A存在而,B不存在就是认为A存在但,B,也就是A,却不存在

耶鲁公开课 - 死亡课程节选

They were asked about their diet and lifestyle habits as well as any pre-existing diseases.

VOA: standard.2010.06.25

So it may be wiser to wait for the relief wells that are being drilled to get down to the point, 4, 000 metres below the sea bed, where they will intersect the existing well.

ECONOMIST: The Gulf oil spill

But the Department of the Environment's legal team argued the statements merely offered clarification and guidance within an existing and well established policy framework and did not amount to a change in planning policy.

BBC: Minister's planning changes ruled unlawful

Poets must be well-versed in the Greek Cypriot dialect, possess adequate knowledge of the popular poetry of Cyprus and the ability to retrieve existing, well-known Tsiattista and, above all, must be able to improvise a new couplet on a specific theme within very strict time constraints and be able to respond to his or her opponent.

UNESCO: Tsiattista poetic duelling