我桌子上放着一本很厚的字典。

Wǒ zhuōzi shàng fàngzhe yì běn hěn hòu de zìdiǎn.

There is a very thick dictionary on my desk.

你可以查字典看看这个字怎么读。

Nǐ kěyǐ chá zìdiǎn kànkan zhège zì zěnme dú.

You can look it up in the dictionary to see how this character is pronounced.

这本字典很旧了，但是我还在用。

Zhè běn zìdiǎn hěn jiù le, dànshì wǒ hái zài yòng.

This dictionary is very old, but I still use it.