either of a pair of ear coverings (usually connected by a headband) that are worn to keep the ears warm in cold weather
earmuff详细解释
ear.muff n.（名词）Either of a pair of ear coverings often attached to an adjustable headband and worn to protect the ears especially against the cold.耳套：一对套住耳朵的物体，通常附在可调节的头带上用来保护耳朵，尤指用来御寒的
