讲解：
a breed of
(人的)类型,种类:
He represents a new breed of politician.
他代表着新一类的政治家。

thrive in
兴旺发达；繁荣；蓬勃发展；旺盛；茁壮成长
New businesses thrive in this area.
新企业在这一地区蓬勃兴起。

relevant (to sth / sb)
紧密相关的；切题的:
These comments are not directly relevant to this enquiry.
这些意见与这项调查没有直接联系。

mass of sth
大量；许多:
I began sifting through the mass of evidence.
我开始认真筛选大量的证据。

groundwork(for sth)
基础工作；准备工作:
Officials are laying the groundwork for a summit conference of world leaders.
官员们正在为世界首脑峰会做准备工作。