VOA慢速英语:研究表明:如今地球冰层的融化速度比上世纪90年代中期还要快

amplification – n. an act, example or product of making something louder by increasing its strength

approach – n. a way of dealing with something : a way of doing or thinking about something

glacier – n. a very large area of ice that moves slowly down a slope or valley or over a wide area of land

solar – adj. of or relating to the sun