1
red dog＝football blitz
在美式橄榄球中，一种防守策略，快速地从（通常是四分卫）接收球的进攻球员被多个防守球员防守住。
＝In American football, a defensive tactic in which the offensive player who receives the ball from the snap (usually the quarterback) is charged at by multiple defensive players; a blitz.
例：The quarterback has been sacked again after another suffocating red dog by the defense.
2
yellow dog
卑鄙的人或事儿＝A despicable person or thing.
例：I can't believe you get so invested in these debates—all politicians are yellow dogs that can't be trusted.
3
Yellow Dog Democrats
黄狗民主党是一个政治词，适用于美国南部的选民，他们只投票代表民主党的候选人。
＝a political term applied to voters in the Southern United States who voted solely for candidates who represented the Democratic Party.
4
The Blue Dog Coalition,
蓝狗联盟，通常被称为蓝狗或蓝狗民主党，是来自民主党的美国国会代表的核心，他们认为是保守的民主党人。
＝commonly known as the Blue Dogs or Blue Dog Democrats, is a caucus of United States Congressional Representatives from the Democratic Party who identify as conservative Democrats.
5
tin dog
(1). ＝iron dog＝a snowmobile (in Alaska). Who’s out there riding the tin dog?
(2). 一款手机应用就叫Tin Dog主要是让不同地区的爱狗人士可以相互联系。
6
greyhound
美国城市间客运巴士，拥有3800个汽车运营中心，是北美最大的汽车经营者，总部在德州的达拉斯。
7
black dog<英国>
黑狗是给予主要在不列颠群岛民间传说中找到的实体的名字。 黑狗本质上是一个夜间的幻影，经常说是与魔鬼或一个地狱伙伴相关联。 它的外观被认为是死亡的故事。
学成语、俚语和谚语是一件很有趣的事。希望你读我的系列文章不仅能够记住这些英文短语和谚语，而且能够从相关的故事中体会到异国文化，一些书本上没有，生活里必知的知识。
未经作者同意不得转载，谢谢！
