The intermediate isomers formed on catalyst 12-46 are unstable and are easily adsorbed and cracked on catalyst 3762;

在12-46催化剂上生成的中间产物——异构化合物很不稳定，易为3762催化剂所吸附和裂化；

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The scheduling problem of finite intermediate storage is considered for some unstable materiel in multi-production batch process.

针对某些不稳定的中间产品，考虑其在中间储罐存储时间有限的调度问题。

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However, until Fred Hoyle applied his mind to the question it looked as though many of the intermediate steps might be too unstable to account for the quantities of those elements that are observed.

ECONOMIST: Sir Fred Hoyle