Simplification

The grammaticalization of kan was embodied in the complication of the grammatical combination, semantic bleach and simplification of pragmatic function.

其语法化在共时平面上有着丰富的表现,至少包括:语法搭配复杂化、语义虚化、语用功能专一化。

Studied the specificity of modification of amino and guandino groups by adopting sodium nitrite to react with amino groups, butadione to react with guandino groups.

对胶原修饰反应的专一性进行研究,有助于进一步研究皮革的鞣制机理。

Taking aconitase as an example in this paper,the mechanism of symmetric substrate molecule selected by enzyme was discussed thoroughly,and the classificatory system of enzyme specificity was analyzed and readjusted.

本文以乌头酸酶为例,深入探讨了酶对对称底物分子进行选择的机理,同时对酶专一性分类系统进行了分析和重新调整。

In EtOH/benzene, 2-butyn-1, 4-diol and its derivatives can be halogenated by cupric halide stereospecifically to obtain (E)-2,3-dihalo-2-buten-1,4-diol derivatives.

采用乙醇 /苯为反应溶剂 ,以α -炔醇为反应原料 ,氯化铜为卤化剂 ,立体专一性合成 (E) - 2 ,3-二卤 - 2 -丁烯 - 1 ,4-二醇及其衍生物。