4 sentences

1. 他是要利用积聚的热量来引爆爆炸物。

   tā shì yào lì​yòng jī​jù de rè​liàng lái yǐn​bào bào​zhà​wù.

   He's using the heat build-up to detonate the explosives.

   Source: OpenSubtitles

2. 他在多年的商旅生涯中积聚了丰厚的财富。

   tā zài duō nián de shāng​lǚ shēng​yá zhōng jī​jù le fēng​hòu de cái​fù.

   He amassed great wealth during his years as a traveling merchant.

   Source: Dong Chinese Dictionary

3. 守财奴积聚钱财不是因为他谨慎，而是因为他贪婪。

   shǒu​cái​nú jī​jù qián​cái bù shì yīn​wèi tā jǐn​shèn, ér shì yīn​wèi tā tān​lán.

   A miser hoards money not because he is prudent but because he is greedy.

   Source: Tatoeba

4. 这些微小的水滴在叶尖上积聚成了一颗巨大的水珠。

   zhè​xiē wēi​xiǎo de shuǐ​dī zài yè jiān shàng jī​jù chéng le yī kē jù​dà de shuǐ​zhū.

   These tiny droplets gathered into a large drop of water at the tip of the leaf.

   Source: Dong Chinese Dictionary