是吗？那我们要去观赏它们。
目前，正是它们从海口溯长江而上，产卵繁殖的高峰期。[{'character': '目', 'pinyin': 'mu4', 'highest pitch': 9.79, 'lowest pitch': 8.79, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '前', 'pinyin': 'qian2', 'highest pitch': 8.79, 'lowest pitch': 6.43, 'duration': 0.38, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.14}, {'character': '正', 'pinyin': 'zheng4', 'highest pitch': 11.33, 'lowest pitch': 10.08, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 10.08, 'lowest pitch': 8.12, 'duration': 0.13, 'prosody hierarchy': '#1'}, {'character': '它', 'pinyin': 'ta1', 'highest pitch': 8.49, 'lowest pitch': 8.12, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '们', 'pinyin': 'men5', 'highest pitch': 8.26, 'lowest pitch': 7.16, 'duration': 0.2, 'prosody hierarchy': '#2'}, {'character': '从', 'pinyin': 'cong2', 'highest pitch': 8.19, 'lowest pitch': 6.84, 'duration': 0.23, 'prosody hierarchy': '#1'}, {'character': '海', 'pinyin': 'hai2', 'highest pitch': 7.19, 'lowest pitch': 6.23, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '口', 'pinyin': 'kou3', 'highest pitch': 7.51, 'lowest pitch': 4.4, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '溯', 'pinyin': 'su4', 'highest pitch': 8.24, 'lowest pitch': 6.6, 'duration': 0.23, 'prosody hierarchy': '#1'}, {'character': '长', 'pinyin': 'chang2', 'highest pitch': 7.47, 'lowest pitch': 6.01, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '江', 'pinyin': 'jiang1', 'highest pitch': 10.16, 'lowest pitch': 7.47, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '而', 'pinyin': 'er2', 'highest pitch': 9.72, 'lowest pitch': 6.47, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '上', 'pinyin': 'shang4', 'highest pitch': 8.14, 'lowest pitch': 5.5, 'duration': 0.29, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.38}, {'character': '产', 'pinyin': 'chan2', 'highest pitch': 10.0, 'lowest pitch': 7.91, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '卵', 'pinyin': 'luan3', 'highest pitch': 10.18, 'lowest pitch': 6.68, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '繁', 'pinyin': 'fan2', 'highest pitch': 9.55, 'lowest pitch': 6.34, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '殖', 'pinyin': 'zhiii2', 'highest pitch': 9.49, 'lowest pitch': 6.31, 'duration': 0.14, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 7.17, 'lowest pitch': 6.47, 'duration': 0.09, 'prosody hierarchy': '#1'}, {'character': '高', 'pinyin': 'gao1', 'highest pitch': 7.37, 'lowest pitch': 6.96, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '峰', 'pinyin': 'feng1', 'highest pitch': 7.82, 'lowest pitch': 6.96, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '期', 'pinyin': 'qi1', 'highest pitch': 8.17, 'lowest pitch': 7.51, 'duration': 0.32, 'prosody hierarchy': '#4'}]