walker-on

基本解释

A dog-walker takes his charges out on the Upper East Side, which has the advantage of easy access to Central Park as well as lesser known green havens such as Carl Schurz Park.
一名遛狗者带着他的狗狗们走在上东城街上。上东城离中央公园和卡尔。舒尔茨公园都很近，尽管后者名气没那么大，但也绿树成荫。
blog.sina.com.cn
Cystic appearance of the posterior fossa does not always represent a Dandy-Walker spectrum anomaly. Absent vermis may be confused with Dandy-Walker anomaly, especially on prenatal ultrasound.
后颅窝囊肿并不总是代表着Dandy-Walker综合症，小脑蚓部的缺乏可能导致与Dandy-Walker异常相混淆，尤其是在胎儿超声检查中。
Del Monte Fresh Produce Inc., whose corporate headquarters is in Coral Gables, Florida, lists another address -- Walker House on Mary Street in George Town, Grand Cayman -- in its SEC filings.
总部位于佛罗里达珊瑚阁（Coral Gables）的德尔蒙特公司（Del Monte Fresh Produce Inc. ）在其美国证监会的文件中却列出了另一个地址——位于开曼群岛乔治城玛丽街的沃克居（Walker House）。

The first about the opulence here at the White House -- five chefs on Air Force One, two projectionists, and a high-paid dog walker -- true?
WHITEHOUSE: Press Briefing by Deputy Press Secretary Josh Earnest