VOA常速英语:Poverty Source of Tropical Infections in Texas, Gulf of Mexico

focus on (使)集中于
例句：The beams of light moved across the sky and focused on the plane.
光束在空中移动,集中对准飞机。

2. The kissing bug looks a little bit like a cockroach but it has the ability to feed on blood and it lives in the very poor quality dwellings

feed on以...为食物
例句：Cows feed on hay.
牛以干草为食。

3. It is a disease that could be associated with severe heart disease, often times aneurisms, even electrical disturbances and sudden death.

associate with把…与…联系在一起；和…联想在一起
例句：One usually associates poverty with misery.
人们一说到贫穷，常常就联想起悲惨的境遇。

4. So that if someone dies from what often times physicians or health care providers in Texas might think is a heart attack - it’s in fact chagas disease

die from由于…而死，因…致死
例句：People die from malaria because they are not treated or treatment is delayed .
人们死于疟疾是因为没有被冶疗或没有被及时冶疗。

5. "In order for a vaccine to be safe and effective, it has to be able to induce a neutralizing antibody response - an antiboyd resp[onsde that will knock out four different viruses simultaneously," he said.

knock out击倒
例句：Jack knocked his opponent out in the second round of the contest.
杰克在比赛的第二回合就把对方击倒了。