如果你不知道这个单词的意思，就查一下字典。

If you don't know what the word means, ___look ___it ___up in a dictionary.

我经常在网上查询新词汇来提高我的英语水平。

I often ___look ___up new vocabulary online to improve my English.

你能帮我查一下去伦敦的火车时刻吗？

Can you ___look ___up the train times to London for me?