“rivalry”多作不可数名词，意思是“竞争”，可以同义替换 competition。我们之前学过 rival 做动词表示“能与…媲美”“与…匹敌”的用法，可以把 rival 和 rivalry 放在一起来掌握。 英英释义：competition for the same objective or for superiority in the same field
例句:
① 中美两国在军事、经济和科技方面的竞争越来越激烈了：
There has been increasing rivalry between China and the US in military, economy, and technology.
② 很多互联网公司都在争夺着日活用户第一的宝座：
Many Internet companies are engaged in the rivalry over who has the largest number of daily active users.
③ Justin 在一篇关于扑克的随笔中也用过 rivalry。由于对决激烈，扑克选手必须得持续审视并调整自己的判断，他是这么写的：
The brutal rivalry enables you to constantly gauge and calibrate your decisions.
④ 最新一期《经济学人》Business 板块的 Schumpeter 专栏写的是谷歌和商业伦理，其中两次用到了 rivalry：
The growing strategic rivalry between the two superpowers is putting pressure on American businesses and investors in two ways. During the cold war business was largely untroubled by superpower rivalry because the Soviet Union was an unwelcoming, closed economy.
1）翻译：
手机厂商之间激烈的竞争使得智能手机越来越便宜了。
The intense rivalry among smartphone makers has brought down the prices of gadgets. Thanks to the bitter rivalry among smartphone makers, smartphones have become cheaper.
2）造句
例子： There have great rivalry between the immune system and the germina during my cold.
场景 ： 在感冒期间我的免疫系统和病菌一直在激烈的斗争
