Definition: when something starts to exist or becomes available Level: B2
市场上新产品的出现增加了竞争。
The ___appearance of new products on the market has increased competition.
汽车的出现方便了我们的生活。
The ___appearance of the car has facilitated our lives.
互联网的突然出现革新了通信。
The sudden ___appearance of the internet revolutionized communication.
