A fresh core is sealed as soon as possible after retrieval from the well to minimize the loss of fluids and exposure to air.

新鲜岩心由井中取出后立即密封以减小流体损失和暴露空气的时间。

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Since the purpose is to minimize alteration, a fresh core has often been drilled with a bland mud, either water - or oil-base, but with a minimum of chemical additives and weighting material.

其目的是为了将岩心的变化降到最低，通常用泥浆或水基、油基泥浆钻取岩心，但是使用少量的化学添加剂和加重物质。

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And then the fuel assemblies are placed into the reactor and the core is operated for about a year to eighteen months before it has to be re-fuelled and fresh fuel has to be put in.

燃料组件会被放置入，反应堆，还有核心会被运作大约一年，到18个月，在它再次燃烧，新的燃料需要加进去。

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Total attendance grew, fueled by acquisitions, but industry insiders say Six Flags had problems attracting fresh faces beyond its core group of repeat visitors.

FORBES: Free Fall

Thin, white threads are obtained from the core of fresh aloe leaves and woven into a net or other pattern on a cardboard background.

UNESCO: Culture

The company has been looking past its longtime rival as it talks up fresh efforts to crack the market for everything from ultra-portable handheld computers to consumer electronics (see "Intel Vows To Rise Again") and shifts from reconquering its core markets to finding fresh opportunities.

FORBES: Intel's Edge