如果中国在人均二氧化碳排放量上向美国看齐的话，世界将遭受难以修补的损害。
If China were to follow the American model in terms of per capita carbon emissions, the world would be damaged beyond repair.
目的观察采用三氧化矿物凝聚体（MTA）修补根管穿孔的短期临床效果。
Objective To observe short-term clinical effect of root perforation repair using mineral trioxide aggregate(MTA).
目的探讨DMG光固化氢氧化钙修补前牙陈旧性根管穿孔的临床效果及可行性。
Objective To discuss the clinical effects and feasibility of repairing old root canal perforation of front teeth using DMG calcium hydroxide.
方法对38颗前牙陈旧性根管穿孔经唇侧根面采用D MG光固化氢氧化钙进行修补，定期回访，观察治疗效果。
Methods 38 teeth of old root canal perforation on the lip were repaired with DMG light-curing calcium hydroxide remedial, and were recalled periodically, observed the effect of treatment.
传统的修补材料有氢氧化钙、银汞合金等，直接用于穿孔的充填。
Conventional material such as calcium hydroxide, amalgam have been used for repairing this perforation.
对于空气氧化膜，电化学反应速度逐步变慢，直至达到相应于稳定钝态的恒定值，同时电位向正移动，表明膜中的微裂纹不断得到修补。
With air-formed films the faradaic processes decreased progressively to a constant rate consistent with the increase in potential, indicating the healing of surface flaws.
对于空气氧化膜，电化学反应速度逐步变慢，直至达到相应于稳定钝态的恒定值，同时电位向正移动，表明膜中的微裂纹不断得到修补。
With air-formed films the faradaic processes decreased progressively to a constant rate consistent with the increase in potential, indicating the healing of surface flaws.
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