However, it is difficult to produce multi branched i heptane and restrain its cracking.

正庚烷异构化的难点在于高选择性地生成多侧链异庚烷和抑制异庚烷的裂化反应.

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Its dry and more numerous, multi - branched, branches have verrucous protruding objects, there are small thorn branches.

其干多丛生, 多分枝, 枝上有疣状物突起, 枝上有细刺.

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