The region began to use quinine successfully as a prophylactic.是什么意思？

The region began to use quinine successfully as a prophylactic.

该地区开始成功地用奎宁作为预防剂。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

region

n. 地区，地域，地带，行政区，管辖区，（大气，海水等的）层，界，境，（学问等的）范围，领域；

例句
During the Soviet era and its immediate aftermath, the region was officially known as 'Middle Asia and Kazakhstan'.
在苏联时代和紧随其后的一段时期，该地区的官方名称为“中亚和哈萨克斯坦”。

began

v. 开始( begin的过去式 )，着手，创始，创办；

例句
He began comically ad-libbing a script...
他即兴调侃起了一段剧本。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

use

n. 使用，使用权，功能；

例句
Abstain from sex or use condoms...
禁绝性事或使用安全套。

quinine

n. 奎宁，金鸡纳碱；

例句
Meanwhile it contents quinine acid which can cure gallstone diseases.
同时含有奎宁酸,能防治胆结石症.

successfully

adv. 顺利地，成功地；

例句
There are tangible signs that the republic's successfully breaking its bonds with Moscow.
有明显迹象表明该共和国成功地断绝了与莫斯科的密切联系。

as

adv. 同样地，一样地，例如；prep. 作为，以…的身份，如

例句
As far as I can recall, Patti was a Smith.
我记得帕蒂是姓史密斯的。

prophylactic

--

例句
Epitope - based vaccines provide a new strategy for prophylactic and therapeutic application of pathogen - specific immunity.
表位疫苗为用特定病原菌的免疫性预防和治疗疾病提供了一项新的策略.