In many porphyry copper deposits, additional enrichment of the metal has been caused by surficial weathering.
在许多斑岩铜矿矿床中, 地表风化使得金属铜进一步富集.
The earthquake may trigger landslides or similar local surficial movements.
地震会引起滑坡或类似的局部地表运动.
Fatigue test is done on medium carbon steel specimens with small surficial pre - cracks and single - edge pre - cracks.
采用带有微小表面预制裂纹和边缘预制裂纹的中碳钢试验片进行了疲劳实验.