6 sentences

1. 救援物资正向灾区集结。

   jiù​yuán wù​zī zhèng xiàng zāi​qū jí​jié.

   Relief supplies are being massed for the disaster area.

   Source: Dong Chinese Dictionary

2. 敌军正在边境地带秘密集结。

   dí​jūn zhèng​zài biān​jìng dì​dài mì​mì jí​jié.

   Enemy forces are secretly massing along the border.

   Source: Dong Chinese Dictionary

3. 赶快集结军队。

   gǎn​kuài jí​jié jūn​duì.

   Quickly gather our army.

   Source: OpenSubtitles

4. 这部年度大戏集结了许多著名演员。

   zhè bù nián​dù dà​xì jí​jié le xǔ​duō zhù​míng yǎn​yuán.

   This major production of the year features many famous actors.

   Source: Dong Chinese Dictionary

5. 这群叛徒在偏远山区集结，企图发动武装叛乱。

   zhè qún pàn​tú zài piān​yuǎn shān​qū jí​jié, qǐ​tú fā​dòng wǔ​zhuāng pàn​luàn.

   This group of rebels gathered in a remote mountainous area, attempting to launch an armed insurrection.

   Source: Dong Chinese Dictionary

6. 为了完成这项紧急任务，公司集结了各部门的精锐。

   wèi​le wán​chéng zhè xiàng jǐn​jí rèn​wu, gōng​sī jí​jié le gè bù​mén de jīng​ruì.

   To complete this urgent task, the company assembled the best talents from all departments.

   Source: Dong Chinese Dictionary