这次的会议集中讨论新产品的发展。

Zhè cì de huìyì jízhōng tǎolùn xīn chǎnpǐn de fāzhǎn.

This meeting focused on discussing the development of new products.

小朋友比较难集中学习。

Xiǎopéngyou bǐjiào nán jízhōng xuéxí.

It’s harder for young children to concentrate on studying.

请大家集中注意力，我们开始上课。

Qǐng dàjiā jízhōng zhùyì, wǒmen kāishǐ shàngkè.

Please focus your attention, we are starting the class.