sophisticated
adj. 复杂的
eg. This process ought to be highly sophisticated.
这个过程应该是非常复杂的。

bednet
n. 蚊帐
eg. Like 82% of children in her country, she sleeps under a bednet.
象该国比例占82%的儿童一样，他睡觉时有一顶蚊帐。

epidemic
n. [病理学]流行病，传染病；（流行病的）迅速传播
eg. An epidemic broke out.
一种流行病突然开始流行。

vaccine
n. 疫苗
eg. The vaccine was used to protect the whole population against infection.
这种疫苗用以为全体居民预防传染病。

immunity
n. 免疫力
eg. The vaccine provides effective immunity within one week for 95% of persons vaccinated.
该疫苗可使95%的接种者在一周内产生有效免疫力。

tuberculosis
n. 肺结核
eg. Tuberculosis can be reactivated by overwork.
肺结核病可以由于过度劳累而复发。