twin ties

基本解释

A rail joint on twin ties.
轨道结点分段连接。
By Thursday, officials said the state's first confirmed case of swine flu was a person with ties to Rocori Middle School in Cold Spring, about 60 miles northwest of the Twin Cities.
在周四时，该州官员说证实第一个感染猪流感是一个与冷泉Rocori中学有关的人，在西北约60英里姊妹城市。
blog.sina.com.cn
From these data, the researchers noted strong ties, outside of twin status, between smoking, older age, and being overweight, and having facial skin with evidence of environmental damage.
研究人员通过分析这些数据发现，不论哪种类型的双胞胎，受到环境伤害的面部皮肤与吸烟、年龄增长、体重超标有很大关系。

She describes the hapless Islamist radicals who were tried for attempting in February 1993 to topple one of the twin towers into the other as mere pawns used by far more sophisticated operatives with ties to Iraq.
CENTERFORSECURITYPOLICY: The right questions
ANKARA, Turkey (AP) — Turkey's prime minister vowed Sunday his country won't be drawn into Syria's civil war, despite twin car bombings the government believes were carried out by a group of Turks with close ties to pro-government groups in Syria.
NPR: Turkey Says It Won't Be Drawn Into Syria Conflict