A lower generation dendritic twelve ester has been synthesized from ethylenediamine and acrylic twelve ester by means of Michael addition reaction in the solvent of methanol . 以乙二胺和丙烯酸十二酯为原料,甲醇为溶剂,采用迈克尔加成反应合成了低代的树枝状十二酯。
I make the distance anywhere between ten to twelve miles. 我猜想距离在十到十二英里之间。
Sell christmas balls ester eggs and all kind acryl. 圣诞舞会卖鸡蛋和各种丙烯酯.
There were twelve of us in all for dinner. 我们一共十二个人吃饭。
None of us can hope to strike twelve every time. 我们中间谁也不能指望回回获胜。