Penicillin is a medicine for infections caused by bacteria, the very small living things that can make you ill. It does not work on viruses, so it will not help a normal cold. Doctors use it for some throat, skin, or chest infections, but only when bacteria are the problem.

Penicillin盤尼西林is a medicine for infections caused by bacteria是治療細菌感染的藥the very small living things that can make you ill細菌是會讓你生病的非常微小的生物。It它does not work on viruses對病毒沒有效so it will not help a normal cold所以對一般感冒沒有幫助。Doctors醫生use it for some throat, skin, or chest infections會用它來治療一些喉嚨、皮膚或胸腔的感染but only when bacteria are the problem但只有在問題是細菌的時候才有用。

It was the first famous medicine of this kind, and it changed the world: some illnesses that used to kill people could now be treated.

It它was the first famous medicine of this kind是這一類藥物裡第一個有名的and it changed the world而且改變了世界: some illnesses that used to kill people以前會致命的一些疾病could now be treated現在變得可以治療。

In 1928 Alexander Fleming saw that a mold had got into a dish of bacteria, and the bacteria around the mold died. The medicine later came from that kind of mold. Though actually, turning that lucky dish into a safe hospital medicine took many other people and more than ten years.

In 1928在1928年Alexander Fleming亞歷山大．弗萊明saw that a mold had got into a dish of bacteria看到一種黴菌跑進了一盤細菌裡and the bacteria around the mold died而黴菌周圍的細菌都死掉了。The medicine這種藥later came from that kind of mold後來就是從這種黴菌研發出來的。Though actually不過其實turning that lucky dish into a safe hospital medicine把這個幸運的一盤變成一種安全的醫院用藥took many other people and more than ten years花了很多其他人的努力和十幾年的時間。

Some people's bodies react badly to it, so they cannot take it. Some bacteria have also learned not to die from it, so it does not fix every infection.

Some people's bodies有些人的身體react badly to it對它反應不好so they cannot take it所以不能使用它。Some bacteria有些細菌have also learned not to die from it也學會了不被它殺死so it does not fix every infection所以它沒辦法治好每一種感染。

You will hear the word from doctors and on medicine boxes. It is a normal, serious word, not slang.

You你will hear the word from doctors and on medicine boxes會從醫生口中或藥盒上聽到、看到這個字。It它is a normal, serious word是一個普通又正經的字not slang不是俚語。