1. The conference was deadly dull.
    会议开得死气沉沉的.

2. In his basement laboratory in London, a bacteriologist, Dr. Alexander Fleming, was searching for a substance that would kill deadly bacteria.
    当时细菌学家亚历山大·佛来明博士正在地下试验室里研制一种能够杀灭致命细菌的物质。

3. From it´s shape, it could be a bushmaster - the most deadly snake of all!
    从它的形状来判断，这很可能是一条美洲毒蛇--一种最致命的蛇!