后成的

Chloro-2-methyl-4-acetoxy-2-butene was treated with hexamethylenetetramine, followed by hydrolysis to yield 4-acetoxy-2-methyl-2-butenal, a key intermediate for vitamin A .

1-氯-2-甲基-4-乙酰氧基-2-丁烯与乌洛托品成盐后水解，得到合成维生素 A的重要中间体4-乙酰氧基-2-甲基-2-丁烯-1-醛，用微波辐射可促进水解，反应0.5h收率可达77%。

The anterior part of the embryonic hindbrain, which gives rise to the ''.

后脑胚胎后脑的前面部分，后发育成小脑和桥

The anterior part of the embryonic hindbrain,which gives rise to the cerebellum and pons.

后脑胚胎后脑的前面部分，后发育成小脑和桥

At the start of the campaign, I was definitely a second stringer in the Holt Generation.

竞选开始后，我完全成为了"霍尔特族"的替补。

The source images of MR hydrography (heavy TSE-T2WI sequence) were reconstructed on workstation. Four 3D post-processing algorithms, including maximum intensity projection, surface shaded viewing, volume rendering and virtual endoscopy, were performed and compared with barium study and endoscopy.

MR水成像扫描（重度T2加权TSE序列）的源图像在工作站上以最大强度重建法、表面遮盖法、容积透视法和仿真内镜法作三维图像后处理，并与钡餐造影和胃镜图像相对照。

A hyperbola relationship between the pulse duration and the laser pulse energy is obtained.

压缩后的激光脉宽与激光能量近似成双曲线关系。

After the defeat of the Empire at the Battle of Endor, Garm Bel Iblis stubbornly waited to be proven right.

帝国在恩多战役中惨败后，加姆·贝尔·伊布利斯顽固地等着他的预言成真。

Below you can see a white incident ray of light, which is reflected off a blue floor.

在下边在图1中，你能看白色的入射光通过地板后反射成蓝色光线。

On the signal transduction related to the resistance in seedling period,result suggested that(1)therewas a larger amount of calcium combined in uninoculated resistant cultivar as compared with that insusceptible cultivar.

在非酶类抗性相关物质研究中，抗病品种和感病品种被病菌侵染后在苗期及成株期玉米叶片细胞中各种抗性物质也有明显不同的变化。

She developed the symptoms "after confronting the wild behaviour of a few boys," said Imperial Household Agency official Issei Nomura.

日本宫内厅官员野村一成称，爱子在遭遇同校"几名男生的粗野行为"后出现了上述症状。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。