这个新版本的软件经过多次改良。

Zhège xīn bǎnběn de ruǎntǐ jīngguò duō cì gǎiliáng.

This new version of the software has undergone multiple improvements.

科学家们致力于改良农作物的品质。

Kēxuéjiāmen zhìlì yú gǎiliáng nóngzuòwù de pǐnzhí.

Scientists are committed to improving the quality of crops.

改良教育体制是提高教育质量的关键。

Gǎiliáng jiàoyù tǐzhì shì tígāo jiàoyù zhìliàng de guānjiàn.

Improving the education system is key to enhancing the quality of education.