Question

英语语法问题

it is a calculational device for determining the betting odds the agent should assign for the outcomes of future experiments to detect the electron and is no more substantial than the number on a luandry ticket.这句话 前面的is 和 should assign 两个谓语呢？

Answer 1

it {is }a calculational device for determining the betting odds 【（that）the agent should assign for the outcomes of future experiments to detect the electron 】and {is} no more substantial than the number on a luandry ticket.

括号内的是定语从句，that作为引导词，在定语从句中 做assign的宾语，所以省略了。
实际上主句是and连接的两个并列句。系动词都是{}标注的is。【主系表结构】
这样你能理解了吗？