查询词典 acknowledge sb. as one's master

Notify sb. of sth.= inform sb. of sth.

正式通知、报告某人某事

Introduce sb./sth to sb.

向某人介绍某人/某物

Introduce sb./sth. to sb.

把某人/某事介绍给某人

Invite sb. to do sth. with sb.

邀请某人与……一起做某事

Invite sb. to do sth= ask sb.

to do 邀请某人做某事 3。

Invite sb. to sth./ invite sb. to do sth.

邀请某人到…/邀请某人做

Keep sb. at a distance: treat sb. coldly

与某人保持一定距离；冷淡某人

Keep sb. from doing sth.: stop sb. from doing sth.

阻止某人做某事，防止某人做某事

I have a general idea of that town.get in touch with sb.; keep in touch with sb.

这两个相似动词短语的区别是：前者是表示动作性的，作"和某人进行接触"解，如

Touch sb on the shoulder , keep in touch with sb = get in tough...

和某某人联系，保持联系。。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。