Many of them wore face masks and overcoats.
他们中的很多人头戴面具，身披外套。
The pair inside wore face masks and white gloves.
车内的两个人带着面罩和白色的手套。
Meteorologists advised the public to wear face masks to ward off dust.
气象学家建议公众外出时戴口罩。
Face masks aren't particularly effective against the spread of flu.
口罩对于流感病菌的传播不是特别有效的。
Surgical face masks can offer some protection against viral outbreaks.
医用口罩对病毒性疾病有一定保护。
Worse, protective measures like wearing face masks barely help because the particles are too small.
石远凯说，“更糟糕的是，因为颗粒太小，像戴口罩这样的保护性措施几乎不会起到什么作用。”
Skiers use masks to keep their face warm in the cold.
滑雪者戴上面罩给脸部保暖御寒。
Skiers use masks to keep their face warm in the cold.
滑雪者戴上面罩给脸部保暖御寒。
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