包括两个相连的诗行的一种诗的单位，通常压韵并具有同样的格律，经常组成一个完整的意思和句法单位。
A unit of verse consisting of two successive lines, usually rhyming and having the same meter and often forming a complete thought or syntactic unit.
双句：包括两个相连的诗行的一种诗的单位，通常压韵并具有同样的格律，经常组成一个完整的意思和句法单位。
A unit of verse consisting of two successive lines, usually rhyming and having the same meter and often forming a complete thought or syntactic unit.
聚合物许多天然和人工合成的化合物中的任一种，通常具高分子的重量，包含最多可达上百万个的彼此重复且相连的单位，每一个单位都是一个相对较轻和较简单的分子。
Any of numerous natural and synthetic compounds of usually high molecular weight consisting of up to millions of repeated linked units, each a relatively light and simple molecule.
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