位置上

The influence of each condition on the reaction speed and yield was studied, and the optimal conditions were: the ratio of the amount of substance of aromatic amine and heptafluoro-isopropyl iodine was 1:1.1~1.5, the amount of substance of sodium dithionite, sodium bicarbonate, aniline compounds were respectively 1.1~1.3, the amount of substance of phase transfer catalyst TBAB and aniline compounds was 0.05~0.1, the concentration of aniline compound was 0.5~1.0 mol/L, reaction temperature was 10~20 ℃, and the solvent was aether.

最佳结果为：芳胺与七氟异丙基碘的物质的量比1：1.1~1.5，连二亚硫酸钠、碳酸氢钠与苯胺的物质的量分别为1.1~1.3，相转移催化剂四丁基溴化铵与苯胺的物质的量比在0.05~0.1，溶剂总用量使苯胺浓度在0.5~1.0 mol/L；反应温度10~20℃；溶剂采用乙醚。取代基供电子性越强，反应时间越短，产率越高；氨基的对位优先反应，氨基的邻位较难发生反应；且七氟异丙基总是优先取代在芳环电子云密度较高的位置上。

I had a seatback diva in front of me last week.

上周，一个著名女歌唱家坐在我前面的位置上。

Alabama is known as the Heart of Dixy because it is in the very middle of a group of states in the Deep South.

阿拉巴马州被誉为"美国南部各州的中心"因为地理位置上它正好处于南部诸州的正中心。

Watts Series 709 Double Check Valve may be installed in either a vertical or horizontal position.

美国瓦茨系列709双止回阀可以安装在垂直或水平位置上。

If you ride on a double-decker bus you can see more things from the top deck.

坐在双层巴士的上层位置上，可以看到更多车外景色。

This function displays the drag image at the specified location in the specified window.

这个函数将拖拉的图像显示在指定窗口的指定位置上。

But there is still some discharge on the drainage site.

但是仍然有一些排泄物在排水位置上。

I would have tried to draw a little attention to myself.

我问自己：如果我处在她的位置上，我会说些什么？

Of the wheel, and suddenly he was in the driver's seat.

忽然间，他已经坐到了驾驶员的位置上。

Many people would do the same in the position of Cater Druse .

如果处在卡特·德鲁斯的位置上，许多人都会像他那样去做的。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。