今天我们带大家来看一下

这一道高频RA新题：

应同学们要求，每一段RA都加了背景知识帮助大家更好地记忆和消化噢~

population growth

How quickly is the world’s population growing? In the United States and other developed countries, the current growth rate is very low. In most developing countries, the human population is growing at a rate of 3 people per second. Because of this bustling growth rate, the human population is well on its way to reaching 9 billion within lifetime.

请同学们首先注意容易读错的生词和音标：

Bustling ['bʌslɪŋ]

Developed [dɪ'vɛləpt]

Developing [dɪ'vɛləpɪŋ]

正确的RA断句及重音：

How quickly is the world’s population growing? // In the United States and other developed countries, / the current growth rate is very low. // In most developing countries, /the human population is growing at a rate of 3 people per second. // Because of this bustling growth rate,/ the human population is well on its way to reaching 9 billion within lifetime.

来听一下Stephii的语音解析：