Racing has always had a symbiotic relationship with betting.是什么意思？

Racing has always had a symbiotic relationship with betting.

赛马总是与赌博相挂钩。

racing

n. 速度比赛，赛跑，赛马，赛车等，竞赛；adj. 专为比赛而设计或饲养的，比赛用的；vi. 赛马(race的ing形式)，竞赛；

例句
The general standard of racing was abysmal.
竞赛总体水平极糟。

has

v. 有( have的第三人称单数 )，（亲属关系中）接受，拿，买到；

例句
...the operation a patient has had.
病人做过的手术

always

adv. 总是，老是，永远，始终，常常，不断地；

例句
Some cities are always going to be more advantaged.
一些城市总会有一些得天独厚的优势。

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

symbiotic

adj. 共生的；

例句
...fungi that have a symbiotic relationship with the trees of these northwestern forests...
与西北部这些森林里的树木存在共生关系的真菌

relationship

n. 关系，联系，浪漫关系，血缘关系；

例句
Our relationship made me feel more alive...
我们的关系使我感到更有活力。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

betting

n. 打

例句
The party is betting that the presidential race will turn into a battle for younger voters...
该党期待这次总统竞选变成一场争取年轻一代选民的斗争。