Level 49
Level 51
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청력
one's hearing
청력에 문제가 있다
to have a problem with one's hearing
의사소통에 어려움을 겪다
to go through difficulties with communication
실내
indoors
실내에서 공기가 건조하다
the air indoors is dry
인체
The human body
노출되다
be exposed to
세균에 노출되다
be exposed to germs
면역력이 떨어지다
for the immune system to weaken
면역력
the body's immune system
환기시키다
to air out, to ventilate
환기가 잘 되다
be well ventilated
하루에 2,3차례 환기시키세요
to air out two or 3 times a day
막다
to block, prevent, guard against, to cover
두꺼운 코트가 바람을 막아 주다
(My) heavy coat blocks (keeps out) the wind
사고를 내다
to cause an accident (to be at fault)
입을 막다
to cover one's mouth
