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n.坚硬；硬性；困难；冷酷 英英释义： hardness[ 'hɑ:dnis ]n.the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scaledevoid of passion or feeling; hardheartedness同义词：unfeelingnesscallousnesscallosityinsensibilitythe quality of bein
