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听力保护装置价格低廉，并且易于获得。
Hearing protection is cheap and readily available at most pharmacies.
youdao
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任何时候都戴好你的安全头盔和听力保护装置。
Wear your safety helmet and ear protection at all times.
youdao
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任何时候都戴好你的安全头盔和听力保护装置。
Wear your safety helmet and ear protection at all times.
youdao