例句與造句

1. A process for preparing m - dichlorobenzene by atmospheric selective transfer reaction of p - dichlorobenzene in the presence of alcl3 and h2o is described . effect of selectivity of the reaction is discussed . the best technological conditions are determined
   闡述了常壓下對二氯苯在催化劑無水三氯化鋁及助催化劑水的存在下發(fā)生轉(zhuǎn)位反應(yīng)，高選擇地制取間二氯苯的工藝過程；討論了影響產(chǎn)物選擇性的有關(guān)因素，確定出適宜的工藝條件。
2. It's difficult to find selective transfer in a sentence. 用selective transfer造句挺難的