查询词典 Ternstroemia

Walnut two sub-thin-skinned and thick-skinned, thin-skinned easy to eat out of walnut, walnut Ternstroemia unpalatable, I am always arguing with him and let him choose for my thin-skinned walnut.

核桃分薄皮和厚皮两种，薄皮核桃易吃出来，厚皮核桃难吃出来，我总是吵着爷爷，让他为我选薄皮核桃。

Local politicians have raised fears that some may not get an education at all. On September 11th the Flemish education board banned religious symbols in all 700 secular state schools under its control, including the Atheneum. Religious schools remain free to set dress codes.

当地政治家已对某些离校学生可能再也受不到教育表示担忧。9月11日，弗拉芒教育委员会在全区共700所世俗公立学校中禁止出现宗教标志，艺术学院也在其中（宗教学校仍可自行确定服饰规定。

It was found that Pd-Co/active carbon catalyst was the optimal catalyst, and Pd-Co/γ-Al2O3 was also good, but silica and kieselguhr were not proper carriers for the object reaction, because of their stronger surface acidity, which could result in the formation of polymer, jammed the micro pores of catalyst, and then resulted in its deactivation. Addition of Bi, Ce and Cu promoters could not improve the activity of catalyst, but La and Ba promoter could enhance the activity of catalyst apparently, and the Co was the best promoter, especially Co was impregnate in advance. It was attributed to that the pre-impregnated Co may occupy the micro pores of active carbon, and cover some bad functional groups on the surface of catalyst, so that the active and selectivity of catalyst could be enhanced obviously.

研究结果表明，Pd-Co/活性炭催化剂是目标转移加氢反应的最适宜催化剂，Pd-Co/γ-Al203效果也较好，而硅胶和硅藻土由于表面酸性较强，容易造成生成聚合物而堵塞催化剂微孔、使催化剂迅速失活；此外，添加Bi、Ce、Cu等助剂时对活性并无改善作用，而添加La和Ba助剂时可使Pd的催化活性有所提高，效果最好的是Co助剂，尤其是先浸渍Co的Pd-Co/C催化剂，原因是Co占据了活性炭的微孔、覆盖了某些对目标反应不利的官能团，使其活性和选择性都有较大幅度的提高。