首次的

UV and HPLC were used for the first time to study the photo-cis-trans isomerism in dilute DNS solution.

首次采用紫外光谱和高压液相色谱初步研究了4，4'-二硝基二苯乙烯-2，2'-二磺酸稀溶液中的光致顺反异构现象。

According to principal of field theory, the concept model of carbon-accumulation field is established, and the isopleth's surface and gradient of carbon-accumulation field are analyzed.

根据场论原理，首次建立了聚碳场概念模型，分析了聚碳场等值面和聚碳场梯度，对聚碳场碳通量的空间变化进行了局域表述。

The interaction of metal complex with RNA has been studied by isothermal titration calorimetry for the first time.

本文首次用等温滴定量热法研究了金属配合物与RNA的相互作用。

In the iterating process the spatial derivative is iterated as well.

首次得到了硬热圈水平上的非线性空间阻尼率。

At the first NBA Jam Session held in Shanghai in 2003… more than 41,000 Chinese basketball fans turned out to participate in basketball clinics, slam dunk contests and 3-on-3 competition over a three-day period.

2003年首次在上海举行的NBA热身赛期间，在短短3天内有4万1千多中国篮球发烧友参加了篮球集训，斯莱姆登竞赛和3对3比赛。

This is the first time Professor Jarvis is presenting his work to the forensic science community.

这是Jarvis教授首次向法医学界报告他的研究工作。

AFTER Barack Obama's first long jaunt abroad as president, Americans are in two minds.

在奥巴马总统结束其上任以来的首次国外之旅后，美国人表现出两种心态。

It was there that selective breeding was first successfully used to develop jet-black and, later,"silver" foxes.

正是在那儿首次成功采用选择性养殖方式，培育发展了油黑狐狸以及后来的"银白"狐狸。

Mr. Obama's first speech to a joint session of Congress on Tuesday night was his chance to change that, and he rose to the occasion.

周二晚上，奥巴马在国会联合会议上首次演讲---而这正是他改变原有形象的一次机会。

It was not Joplin's first published music.

这不是乔普林的音乐首次出版。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。