He recruited another nucleic acid chemist, a young Pakistani, Dr. Rao Sastri.是什么意思？

He recruited another nucleic acid chemist, a young Pakistani, Dr. Rao Sastri.

他又找来一名核酸化学家, 叫作拉奥·萨斯特利的年轻的巴基斯坦人.

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

recruited

v. 招聘( recruit的过去式和过去分词 )，吸收某人为新成员，动员…（提供帮助），雇用；

例句
Before World War II, women were not recruited as intelligence officers...
在第二次世界大战之前，女性不能当情报人员。

another

adj. 又一个，再一个，另一的，其他一种；pron. 另一个，别个，再一个；

例句
He was accusing my mum of having an affair with another man...
他指责我妈妈与另一个男人有染。

acid

adj. 酸味的，尖刻的，酸的，酸性的；n. <化>酸，酸味物质；

例句
This comedy of contemporary manners is told with compassion and acid humour.
这部当代风尚喜剧杂糅了悲悯的情怀和尖酸的幽默。

chemist

n. 化学家，药剂师，药商，药房；

例句
There are many creams available from the chemist which should clear the infection...
很多能够消除这种感染的药膏在药店就能买到。

young

adj. 年幼的，有朝气的，年轻人的，青年的；n. 年轻人，幼小的动物，崽；

例句
...incentives to private landlords to accept young people as tenants.
鼓励私人房东租房给年轻人的措施

Pakistani

adj. 巴基斯坦的；n. 巴基斯坦人；

例句
Workers who went to the Gulf came from the poorest sectors of Pakistani society.
前往海湾的工人来自巴基斯坦最贫穷的社会阶层。

DR

abbr. (=data register) 资料暂存器，(=delivery room) 图书出纳室，产房；

例句
A Dr Matthew Owens was reported missing while on an expedition to north-eastern Turkey.
据报道，一位叫马修·欧文斯的博士在前往土耳其东北部考察的途中失踪了。