how to find a word in emacs for example,i want to find 'equation' in the text?

I Never Find A Word To how to find a word in emacs for example,i want to find 'equation' in the text? I , can't find word to express how much , I LIKE YOU !什么意思? ---How to make a sentence with the wordsale?---We can find e______in the dictionary. i want to find a book how good is cooked how to find a friend How to find a girlfriend? How to find a prostitute? How to study englishwhere i can find 晚安 I want to find a word to describe you.I think that word is night.so,good night黑色背景的 谁有这张图片啊求分享! i set up a new system,but the word fond is very ugly,and i cannot find the shu ru fa ,how can i do it how to find a good job? how to find a foreign friend 英语翻译全文：When you are learning English,you find it not clever to put an English sentence,word for word,into your own language.Take the sentence How do you do? as an example.If you look up each word in the dictionary,one at a time,what i I don‘t know how to make a chicken sandwich.Let‘s go and find r_____ How do I find the happiness?It is a difficult issue to figure out help!I can't find the ___ word to express my feeling.A just B exact C obvious D true I can’t find the ______ word to express my feelings.A、 just B、 exact C、 obvious D、true