1. 等同物;等值物；对应物
If one amount or value is the equivalent of another, they are the same.
e.g. The equivalent of two tablespoons of polyunsaturated oils is ample each day...
每天相当于两大汤匙多重不饱和油的量就足够了。
e.g. Even the cheapest car costs the equivalent of 70 years' salary for a government worker.
即使是最便宜的汽车，价格也相当于一个公务员70年的薪水。
2. 相等物;对应物；对应者
The equivalent of someone or something is a person or thing that has the same function in a different place, time, or system.
e.g. ...the civil administrator of the West Bank and his equivalent in Gaza.
约旦河西岸的民政官和加沙的同职官员
e.g. ...the Red Cross emblem, and its equivalent in Muslim countries, the Red Crescent.
红十字及其在伊斯兰国家的对应标志——红月牙
3. （强调效果的强烈或严重）相当于…的事情
You can use equivalent to emphasize the great or severe effect of something.
e.g. His party has just suffered the equivalent of a near-fatal heart attack.
他所在的政党刚刚经历了一次类似心脏病突发般几近致命的打击。