Instantly through it slipped, easily and without pain, notwithstanding the grating was pretty large and thick.
尽管铁栅栏看起来又大又厚,可他却毫不费力地滑了过去。
One of the issues with gum disease is that it often develops slowly and without pain.
与牙周病的问题之一是,它往往发展缓慢,没有痛苦。
Even the otherwise complex immunochemistry topics were dissected in details, and without pain.
即使不这样复杂的免疫化学题目被详细,和没有痛苦详细研究。
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