购买家电时，不要只看外观，还要比较一下性能和价格。

Gòumǎi jiādiàn shí, búyào zhǐ kàn wàiguān, hái yào bǐjiào yíxià xìngnéng hé jiàgé.

When buying home appliances, don’t just look at the appearance; you also need to compare performance and price.

这款手机的性能很好，运行速度非常快。

Zhè kuǎn shǒujī de xìngnéng hěn hǎo, yùnxíng sùdù fēicháng kuài.

The performance of this phone is very good, and it runs very fast.

如果想提高电脑性能，可以先加大内存。

Rúguǒ xiǎng tígāo diànnǎo xìngnéng, kěyǐ xiān jiādà nèicún.

If you want to improve your computer’s performance, you can first increase the memory.