是的，我记得上个月价格已经有所上涨了。
而当时的理由也是原材料上涨过快。[{'character': '而', 'pinyin': 'er2', 'highest pitch': 8.99, 'lowest pitch': 7.78, 'duration': 0.23, 'prosody hierarchy': '#2'}, {'character': '当', 'pinyin': 'dang1', 'highest pitch': 11.08, 'lowest pitch': 10.35, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '时', 'pinyin': 'shiii2', 'highest pitch': 10.9, 'lowest pitch': 7.22, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 8.72, 'lowest pitch': 7.22, 'duration': 0.09, 'prosody hierarchy': '#1'}, {'character': '理', 'pinyin': 'li3', 'highest pitch': 8.72, 'lowest pitch': 5.52, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '由', 'pinyin': 'iou2', 'highest pitch': 8.0, 'lowest pitch': 5.74, 'duration': 0.26, 'prosody hierarchy': '#2'}, {'character': '也', 'pinyin': 'ie3', 'highest pitch': 7.76, 'lowest pitch': 5.87, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 10.57, 'lowest pitch': 7.11, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '原', 'pinyin': 'van2', 'highest pitch': 9.13, 'lowest pitch': 6.35, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '材', 'pinyin': 'cai2', 'highest pitch': 7.6, 'lowest pitch': 6.29, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '料', 'pinyin': 'liao4', 'highest pitch': 7.67, 'lowest pitch': 6.36, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '上', 'pinyin': 'shang4', 'highest pitch': 9.49, 'lowest pitch': 7.59, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '涨', 'pinyin': 'zhang3', 'highest pitch': 7.76, 'lowest pitch': 5.05, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '过', 'pinyin': 'guo4', 'highest pitch': 7.48, 'lowest pitch': 5.49, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '快', 'pinyin': 'kuai4', 'highest pitch': 9.2, 'lowest pitch': 6.1, 'duration': 0.34, 'prosody hierarchy': '#4'}]