the crowd paniced at the sound of the explosion.
dedicate dedicate 奉献
i felt guilty about not visiting my parents more ofter.
there past few years have been a living hell.
correct
current n.水流,气流,趋势
ritual 习惯,礼仪
my office is well ventilated. ventilate 通风
efficient 高效的
efficient heating equipment is necessary for a harsh winter.












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