quaternary

基本解释

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。
"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 most powerful of feedbacks in the Arctic is sea ice and snow cover, said Miller, the lead author on a paper about past "Arctic amplification" in the journal Quaternary Science Reviews.
在北极，反馈最强的莫过于海冰和积雪，米勒说，他是第四纪科学评论杂志中关于过去“北极的放大效应”一文的主要作者。

Studies by the International Union for Quaternary Research conclude that some ocean levels have even fallen in recent decades.
FORBES: Hot Sensations Vs. Cold Facts
Together with our colleagues of the INQUA (International Union for Quaternary Research) focus area group on palaeoseismology and active tectonics, IGCP 567 started a new tradition of joint field workshops.
UNESCO: Tales set in Stone: learning from ancient earthquakes
There, the scientists themselves report that the anti-microbial agent has been known and used for years—a cationic polymer, like quaternary polyetheleneimine, which kills bacteria by tinkering with the molecular integrity of cell membranes.
FORBES: New Antibacterial Clothing: Secret Ingredient Revealed

第四纪
第四系
Mapped the new quaternary tectonic map of four fault basin based on the data of shallow seismic profiles, drilling, and the redrawn fault system divided by the potential data processing, etc.
6、利用浅层地震剖面、钻井等资料,并参考重磁划分的断裂系,新编制了山西四个断陷盆地的第四系构造图。
第四期

第四纪
Most of the gas fields in China have been formed and finalized in Neogene Quaternary,which distribute widely in various petroliferous basins.
中国大多数气田最终形成、定型于新近纪 -第四纪 ,它们广泛地分布于各类含气 (油 )盆地。
四元的(合金)