[ti:]

[ar:]

[al:]

[by:听力课堂～www.tingclass.net]

[00:02]environment 环境，周围状况

[00:18]surroundings 周围的事物，环境

[00:35]estimate 估计，估量

[00:48]evaluate 评估，评价

[01:00]compute 计算，估算

[01:12]