建立集体合同制度的英文：
to establish a group contract system
v. 建立，设立；安置；使立足；证实；制定，规定；（使）确定，确立
Eastern Establishment
东部权势集团
This community was the heart of the American Establishment.
这个集团是美国权势集团的心脏。
The eradication of an established infestation is not easy
根除昆虫蔓延是不容易的。
n. 组；团体；集团
v. 使聚集；将…分类，把…分组
grouping of data
资料归类
They are a group of wakes.
他们是一群守夜的人。
This group could be subdivided into two small groups.
这个组可以分成两个小组。
n. 契约；合同；婚约
v. 感染；（使）缩小，缩短，收缩；订契约
The contract was negotiated.
合约已谈妥。
confidentiality of contracts
合同的保密性
Renewal of contract
合同的续订