1. he's never been a ha'p'orth of bother.
   他从来没让人伤过一点脑筋。
2. Don't spoil a sheep for a ha'p'orth of tar.
   不要因小失大。（不要见了芝麻，丢了西瓜。）
3. It is useless spoiling the ship for a ha'p'orth of tar.
   【谚】吝惜半便士柏油而毁坏一只船(因小失大)。
4. The relapse of orthodontically rotated teeth can be a serious problem in occlusal stability after orth-odontic treatment.
   扭转牙的复发是正畸临床治疗后牙稳定性的难题之一。
5. Objective To describe the distributional characteristics and development of dentists doing orth-odontic work in Liaoning.
   目的描述辽宁省11个城市口腔正畸人才的发展状况和分布特点。

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