quaternary

基本解釋

In their study, the scientists looked at quaternary ammonium compounds (QACs) that are used in many household cleaning goods.
在他們的研究中，科學(xué)家驗(yàn)證了在許多家居清潔產(chǎn)品中使用的季銨鹽化合物。
"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：“這標(biāo)志著在接下來(lái)的很長(zhǎng)一段時(shí)間內(nèi)，我們將轉(zhuǎn)向如何處理晚第四紀(jì)的滅絕。
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.
在北極，反饋?zhàn)顝?qiáng)的莫過(guò)于海冰和積雪，米勒說(shuō)，他是第四紀(jì)科學(xué)評(píng)論雜志中關(guān)于過(guò)去“北極的放大效應(yīng)”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

第四紀(jì)
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、利用淺層地震剖面、鉆井等資料,并參考重磁劃分的斷裂系,新編制了山西四個(gè)斷陷盆地的第四系構(gòu)造圖。
第四期

第四紀(jì)
Most of the gas fields in China have been formed and finalized in Neogene Quaternary,which distribute widely in various petroliferous basins.
中國(guó)大多數(shù)氣田最終形成、定型于新近紀(jì) -第四紀(jì) ,它們廣泛地分布于各類(lèi)含氣 (油 )盆地。
四元的(合金)