Zhèbù xiǎoshuō de shíjiān kuàdù chángdá bàn ge shìjì.
The novel covers a time span of half a century.
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Originally an architectural term, the horizontal distance between two supports of a bridge or roof. Now extended to almost any 'span': 时间跨度 time span, 年龄跨度 age range, 风格跨度 stylistic range.
