四价的

MethodsⅠMaximal electroshock seizure was adopted to analyse the relative of dose and effect, relative of time and effect, including maximal efficacy and potency of these five extractives in mice given by ig administration.ⅡMetrazol seizure test was used to compare seizure latency, anticonvulsant rate and mortality of mice with every extractives.ⅢPharmacodynamic parameters of five alcoholic extractives were assayed by means of Pharmacological Effective Method.ⅣUsing the model of seizure rats induced by penicillin localized injected in cortex,we studied the effect of extractives on seizure latency, frequency of epileptiform discharge, highest wave of hippocampus EEG(Recoded by RM6240C multichannel physiological signal collection and analysis recorde), the changes of convulsant behaviors and the latency of seizure.

方法①采用最大电休克惊厥模型，分析灌胃小鼠各药的量效和时效关系，比较其效价强度和效能；②采用戊四唑惊厥模型，比较ig小鼠各药的惊厥潜伏期、抗惊厥率和死亡率；③采用药效法，运用数学模式及参数来模拟各药在体内的药效动力学过程；④制备大鼠皮层定位注射青霉素点燃模型，采用RM6240C型多道生理信号采集处理系统记录脑电图，比较ig各药对痫性发作潜伏期及发作程度、痫性放电潜伏期、痫波发放频率及最高波幅的影响；⑤采用HPLC法测定海马区癫痫相关递质的含量，比较各药对Glu、Asp、Gly、GABA的影响。

Years 9 on 9, China National Petroleum Group to Australia's largest oil and gas producer Woodside Petroleum to buy up to 45 billion Australian dollars worth of liquefied natural gas, the Bank of China the same day the conversion price, 1 Australian dollar to 6.2430 yuan to calculate, when the China National Petroleum Corporation's property for 280.935 billion yuan.

二千零七年9月9日，中国石油天然气集团对澳大利亚最大的石油和天然气生产商伍德赛德石油公司购买最多45亿美元的液化天然气，中国银行的同一天，澳元兑换价， 1澳元六点二四三零元计算，当中国石油天然气集团公司的财产为2809.35亿元。

Cardiolipin is a unique Phospholipid with dimeric structure, carrying four acyl groups and two negative charges.

心磷脂是脂类中独一无二的带有负二价头部基团及多达四条尾链的磷脂分子，是线粒体内膜的主要成分，作为与功能相关的膜结构转变的主要参与者，近几十年来深受研究者的关注。

The news sent stocks and the dollar tumbling, while bond prices approached four-year highs and investors briefly increased their bets that the Federal Reserve could cut interest rates by as much as 75 basis points at its policy meeting this month – although Fed watchers think 50bp is more likely.

此新闻使股票和美元交易价摇摆不定，当债券价格接近四年来最高点的时候，投资者们更期望联邦储备局在这个月的政策会议上可以下降75%的利率点，尽管联邦观察员们认为最可能的利率点是50

The ability of carbon to form stable compounds in such astonishing numbers arises in that it utilizes its four valence electrons completely in the establishment of four covalence,its valence shell becomes saturated.

碳原子能够利用其全部四个价电子构成共价键，并形成稳定的饱和价电子层。这就导致碳元素能构成各类数目惊人的稳定化合物。注意本句使用的是&逆序&的翻译方法。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。