abab

A quatrain may also be any group of four lines unified by a rhyme scheme. Quatrains usually follow an abab, abba, or abcb rhyme scheme.

四行诗通常是通过押韵组合成的四行诗节的诗，亚运形式一般为abab， abba，或abcb。

The Shakespearean sonnet consists of three quatrains (four-line stanzas), rhyming abab cdcd efef, and a couplet (a two-line stanza), rhyming gg.

莎式十四行诗由三组四行诗节和一个对句组成，韵牌分别为 abab cdcd efef 和gg。

The "ABAB", "BBB" sequences middle-fine grained sandstones in longitudinal gravity flows, slide gravity flows and storm gravity flows are favorable for oil and gas accumulation.

盐湖等深流沉积。风暴重力流、纵向重力流和滑塌重力流中的“ABAB”序和“BBB”序中—细砂岩是油气聚集的有利场所。

As for image coloring, all adjective reduplications but ABAB pattern can make expressions more vivid by emphasizing on items´ characteristics and strengthening its description and state.

从形象色彩分析，除ABAB式以外的形容词重叠式通过重叠强化事物的某种性状，加强描写性和状态性，从而使得表达更加形象生动。