Etiology was complexed and infection and endotoxin were the main causes.

其主要病因是各种感染及内毒素。

L-dopa, when complexed with diverse metal ions , shows different colors.

用左旋多巴与多种金属离子生成络合物，产生各自不同的颜色；

That is, the practice is destined to be a profound and complexed problem.

这也注定了实践是一个深厚绵长，复杂的问题。

The purine and pyrimidine may be complexed with a sugar to produce a nucleoside.

嘌呤和嘧啶可以同一个糖复合，产生一个核苷。

The best characteristic can be used in the complexed sand containing 50% old sand.

该粘合剂最大特点是能回用旧砂，回用的比例可达50%。