英语听力精选进阶版 13755

（单词翻译）

Sight problems for students in Asia 

Vocabulary

emphasis

special importance

a heavy price

a high cost / a big loss

exposure

time spent being in contact with something

visual impairment

damaged sight

nap

short sleep

genetic

connected with genes (units in the cells of a living thing that control its physical characteristics)

a big role

a major cause

ethnic groups

people connected by different nationalities or race

myopia

short-sightedness 

mandatory

compulsory