不由得

在诸多爱心人士的倾力不由得下，困难学子得以顺利完成学业。

zài zhū duō ài xīn rén shì de qīng lì bù yóu de xià, kùn nán xué zǐ dé yǐ shùn lì wán chéng xué yè.

Thanks to the dedicated efforts of many dedicated individuals, struggling students have successfully completed their studies.

久别重逢看到年迈苍老的母亲在风雨中翘首期盼，他眼眶湿润心中不由得一阵酸楚。

jiǔ bié chóng féng kàn dào nián mài cāng lǎo de mǔ qīn zài fēng yǔ zhōng qiáo shǒu qī pàn, tā yǎn kuàng shī rùn xīn zhōng bù yóu de yī zhèn suān chǔ.

Seeing his old mother looking forward to her again in the wind and rain after a long separation, his eyes were wet and he couldn't help but feel sad in his heart.