首次

This is the first reliable trematothoracin sawfly discovered in China and in the Jurassic Period.

这是在国发现可靠的陷胸茎蜂化石，也是该亚科在侏罗的报道。

CD outsells vinyl for the first time.

光盘的销售量超过塑胶唱片。

I had a crise de nerfs before the first performance.

在演出前紧张得几乎崩溃。

In addition, we found that there are two ultrafast exciton dynamics in Allophycocyanin trimer.

发展了蓝光高效双光子荧光化合物。

These truths were by no means self-evident when Galileo first suggested them.

伽里略提出这些真理时决非显而易见。

Wirephoto - The first electronically-transmitted photograph is sent by Western Union.

西部联合电报公司采用电子有线传真传输图片。

Fleming discovered penicillin early in the twentieth century.

弗莱明在20世发现了青霉素。

We didn’t meet anybody new at the tea party.

在茶话会上们没有碰到任何见面的。

Isoquercitrin is obtained from Hypericum perforatum L.for the first time.

从贯叶金丝桃中分离得到化合物异槲皮苷。

Hawke first hoisted his flag at Spithead.

霍克伊在斯彼特海德海峡升起了自己的旗舰旗。

The ore-bearing rock is composed mainly of andesitic tuff and tuffite.

作者在赋矿层中发现了层状电气石岩。

Constable’s landscapes met with indifference when they were first exhibited.

康斯特布尔的风景画在展出时受到了冷遇。

The first offshore multiwave and multicomponent seismic experiment has been made by CNOOC.

中国海洋石油领域开展了海上多波多分量地震试验。

Nicotine has been studied for the first time by pulse radiolysis techniques.

摘要运用电子脉冲辐解技术研究尼古丁分子的化学活性。

Conducting the premiere of a symphony without a rehearsal requires temerity.

不排练而直接指挥一部交响乐的公演是鲁莽的。

Propylene glycol monoether acetate was synthesized using heteropoly acid as catalyst for the firsttime.

以杂多酸为催化剂采用酯化法合成丙二醇单乙醚乙酸酯。

Under the same chrmatographic condition, gas chromatography quantitative analysis of the butachlor and simetryne were discribed.

报道了丁草胺和西草净在同一色谱条件下的气相色谱定量分析。

First awarded in 1991, the Packing Room Prize is adjudicated by the Gallery's storeman, Steve Peters.

颁发于1991年，包装室奖被判定由画廊的仓库，史蒂夫彼得斯。

The idea for a facsimile transmission was first proposed by Scottish clockmaker Alexander Bain in 1843.

传真传输的设想是由爱尔兰钟表匠亚历山大.贝恩于1843年提出。

Conclusion:Oleanolic acid and daucosterol were isolated from this plant for the first time.

齐墩果酸和胡萝卜苷为在该植物根中分离得到。