1. The person may feel sick, throwing up whatever is in the stomach.

throw up 放弃
例句：He had to throw up his whole plan.
他只得放弃整个计划。

2. One form of Salmonella is also responsible for the disease typhoid.

be responsible for 为…负责，形成…的原因;主管
例句：You'll be responsible for anything wrong.
出了事唯你是问。

3. Instead, Mr. Curtiss hopes the genetically-modified bacteria will be used in addition to more traditional therapies, such as chemotherapy and radiation.

in addition to 除…之外
例句：In addition to light, there are dangerous radiations gi-ven off by the sun.
除了光以外，太阳还发出危险的放射线。