chemical techniques to purify it.
4. If penicillin had been available, many people would have died from bacterial illness or even minor wounds.
5. It was fundamental to saving many thousands of lives and is one of the most important medicines of contemporary.
知识点归纳：
1. trial n. 试用；试验；审问 try
On trial受审；在试验中 go on trial 受到审理 come to trial 开庭审理
2. note
make / take a note 把…记下来 take not of = take notice of 注意到
leave a note 留下便条 on a personal note
3. to one’s relief 使某人宽慰的是
4. take down
take up take on take in take over take off take back
5. turn up 出现；到来，调大
turn down 关小；拒绝 turn in = hand in上交 turn off关掉
turn on打开 turn over翻转 turn out证明是，结果是，生产出
turn to 求助于；变得 turn round转向
Ex: |
