Design of quaternary Schmitt circuits.

四值施密特电路设计。

We know little of a quaternary compound.

我们对四元化合物了解得很少。

The Quaternary sediments are largely undeformed.

第四纪的沉积物大部分未变形。

In Quaternary, some faults showed a right-handed slipping.

部分断裂到第四纪表现为右行走滑。

Review and prospects of Quaternary Glaciation research in China.

中国第四纪冰川研究的回顾与展望。

Most Quaternary saline lakes occur in West and Northeast China.

第四纪盐湖主要分布于我国西部和东北部。

The activity of igneous rocks mainly concentrates in Neogene and Quaternary.

火成岩活动主要集中在晚第三纪和第四纪。

The Cenozoic era is composed of tertiary period followed by quaternary period.

新生代是由第三纪和第四纪组成的。

The Quaternary glaciation started just a few million years ago – and is still going on.

第四纪始于几百万年以前，并延续到现在。

Maodong Canyon, the typical karst landform, is the relics of the quaternary glacier.

卯洞峡是第四纪冰川遗址，典型的喀斯特地貌。

The middle segment controls Quaternary basins and shows activity in late Quaternary.

中段控制第四纪盆地，并具有晚第四纪活动性。

Position quaternary predicate shape, edit reading, connect roles, and add constraints.

定位四元谓词形状、编辑读数、连接角色和添加约束。

The steady (subsidence) stage of the Quaternary was the period of biogas accumulation.

第四纪盆地稳定沉降阶段为生物气聚集成藏时期。

This method does not produce or require the handling of corrosive quaternary ammonium hydroxides.

这一方法不产生或不要求处理腐蚀性的季铵氢氧化物。

Four new types of organic siloxane surfactants with quaternary ammonium group have been obtained.

通过多步骤合成了四种含有季铵基的有机硅表面活性剂。

There are a small number of Quaternary dormant volcanic groups in China, lava landscape rich and unique.

这里有中国为数不多的第四纪休眠火山群，溶岩景观丰富奇特。

A great many proteins, especially enzymes, are oligomeric and consequently possess quaternary structure.

很多蛋白质尤其是酶类，是低聚物，因此拥有四级结构。

Evolution of desert is one of important aspect of Quaternary paleoclimate and paleoenvironment research.

沙漠形成演化是第四纪古气候、古环境研究的重要内容之一。

The orebody occurred below Quaternary, mineralization is closely related to tectonic activity and alteration.

矿体赋存于第四系之下，矿化与构造活动及蚀变密切相关。

The formation and evolution of Quaternary natural environment is the key link of Quaternary geological study.

第四纪自然环境的形成和演变是第四纪地质史研究的中心环节。

It's evident that the ice sheets have gone through multiple stages of growth and retreat over the course of the Quaternary.

很明显，在第四纪，冰层已经历过生长和消融的多个阶段。

Montmorillonite was ion exchanged with quaternary ammonium salt, which was intercalated into the crystal layers of MMT.

用长链季铵盐对蒙脱土进行离子交换反应，季铵盐嵌入到蒙脱土的层间。

The natural thermoluminescence in Quaternary sediment has stored accumulated irradiated dose since the sediment deposited.

第四纪沉积物的天然热释光中储存有自沉积以来的累积辐射剂量。

"It is a long time coming and marks a turning of the tide in how we approach these extinctions of the Late Quaternary," she says.

她指出：“这标志着在接下来的很长一段时间内，我们将转向如何处理晚第四纪的灭绝。”

The cool temperatures of the Quaternary may have allowed our brains to become much larger than those of our of hominid ancestors.

第四纪的凉爽气温或许让我们的大脑比人类远祖的大脑更大。

In their study, the scientists looked at quaternary ammonium compounds (QACs) that are used in many household cleaning goods.

在他们的研究中，科学家验证了在许多家居清洁产品中使用的季铵盐化合物。