Chemically is the adverb that belongs with chemical. It means in a chemical way, by using chemistry, or if we look at the substances.

Chemically是chemical對應的副詞。 It means in a chemical way, by using chemistry, or if we look at the substances意思是「用化學的方式」、「透過化學」，或是「就物質本身來看」。

So two things can look different but be chemically the same; wood can be chemically treated so it does not rot; chemically speaking, we are talking about what something is made of and how it changes. The ground is always substances, the study of substances, or processes that change substances — the same ground as chemical — but chemically tells you how something happens or how we are talking, not what kind of thing it is.

So two things can look different but be chemically the same所以兩樣東西外觀可以不一樣，但chemically（化學成分上）是一樣的；wood can be chemically treated so it does not rot木材可以經過化學處理讓它不腐爛；chemically speaking, we are talking about what something is made of and how it changes從chemically的角度來說，我們談的是這個東西是由什麼組成、又是怎麼變化的。 The ground is always substances, the study of substances, or processes that change substances它談的範圍永遠是物質、物質的研究，或改變物質的過程—— the same ground as chemical跟chemical的範圍一樣—— but chemically tells you how something happens or how we are talking但chemically告訴你的是事情怎麼發生、或我們是怎麼談論它， not what kind of thing it is而不是說這是哪一種東西。

You will see it in science writing more than in chat. It does not mean ‘by a chemist’ in the shop sense, and it is not a fancy way to say ‘with medicine.’

You will see it in science writing more than in chat你會在科學寫作裡看到它，比在聊天裡多。 It does not mean 'by a chemist' in the shop sense它不是指藥局意義上的「藥劑師弄的」， and it is not a fancy way to say 'with medicine.'也不是「用藥物」的一種花俏說法。