USE OF ENGLISH

1. I have just seen John. He is in the bar having a drink.(同時發生)

2. Peter hurt his arm playing tennis.(短行動在長行動進行期間發生)

             SHORT        LONGER

3. Taking a key out of his pocket, he opened the door.(有先後)

            FIRST                           THEN

4. Feeling tired, I went to bed early.(解釋main clause的行動)

     EXPLAIN           ACTION

BIOLOGY

蛋白質的合成有以下三個步驟︰

1.轉錄作用

2.氨基酸的活化                                  

3.轉譯作用