单键

Click a heading , or press the TAB key to highlight a heading , and then press ENTER.

单击标题，或按TAB键来突出显示标题，然后按ENTER键。

For right-clicking, you press down with two fingers, or you can set an option to perform right-clicking with one finger by pressing on one of the lower corners of the track pad.

如果要点击右键，你需要使用两个手指按压，或者你可以自行设置，通过按压触控板的左下角或者右下角，实现单指点击右键。

In chapter four, the preperation of ytterbium diiodide was examined. The reductive cleavage of Se-Se bond and S-S bond induced by ytterbium diiodide was investigated. The reaction of diselenides and disulfides with allylic bromide promoted by ytterbium diiodide was also examined. The intermolecular Barbier-type reaction induced by ytterbium diiodide was studied. In the last section of this chapter, the intermolecular reductive coupling of nitriles with azides induced by samarium diiodide was investigated.

第四章，研究了二碘化镱的制备方法，以及二碘化镱作为一种优良的单电子转移试剂在有机合成中的应用：二硒醚的Se--Se键和二硫醚S-S键的还原断裂，及其在合成烯丙基硒醚，硒代酯和烯丙基硫醚，硫代酯中的应用，实验结果表明二碘化镱也能促进分子间的Barbier反应，而文献认为二碘化镱不能促进分子间的Barbier反应；最后研究了二碘化钐促进的叠氮化合物与腈的交叉还原偶联反应，一步高收率地制备脒的方法。

The monoamines are almost planar; one bond angle in each diamine and triamine is planar, other bond angles remain.

激发态单胺几乎呈平面状；对于双胺和三胺，一个氮原子键角度呈直线型，其它氮原子键角度几乎没有变化。

Although benzene is often represented with alternating single and double bonds between carbon atoms, the electrons in the bonds are shared or delocalized in such a way as to make all carbon-carbon bonds alike .

虽然往往把苯描绘成碳原子之间按单、双键交替排列，但事实上键中的电子是共享的，或者说是非定域的，其结果是使所有的碳原子都是等同的。

Although benzene is often represented with alternating single and double bonds between carbon atoms, the electron s in the bonds are shared or delocalized in such a way as to make all carbon-carbon bonds alike.

虽然往往把苯描绘成碳原子之间按单、双键交替排列，但事实上键中的电子是共享的，或者说是非定域的，其结果是使所有的碳原子都是等同的。

Although benzene is often represented with alternating single and double bonds between carbon atom s, the electrons in the bonds are shared or delocalized in such a way as to make all carbon-carbon bonds alike.

虽然往往把苯描绘成碳原子之间按单、双键交替排列，但事实上键中的电子是共享的，或者说是非定域的，其结果是使所有的碳原子都是等同的。

Glycosidic bond A bond formed between monosaccharides by removal of water.

糖苷键：单糖间脱掉一分子水后形成的一种键。

For Type 8510B, the taper key/disc connection and the splined valve shaft with clamped lever and single pivot linkage reduce lost motion between the actuator and valve.

对于类型8510B的，锥键/光盘连接和花键轴与钳制阀杠杆和单支点之间的联系，减少损失的执行器和阀门的议案。

The standard cell phone style discrete button direction pad with a center action button is a good interface for one handed navigation and selection, but it sucks for games, where you really want a game boy style rocking direction pad for one thumb, and a couple separate action buttons for the other thumb.

传统的手机往往在四个方向键中嵌入一个中心动作按钮，这种按键布局方式有利于人们用单手来操作，但对于游戏来讲，确是糟透了，在玩手机游戏时，你可能真的希望自己的一只手能够操作一个Game Boy风格的方向键，而另一只手来控制一对相分离的动作按钮。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。