There's a lag phase, and there's a slow rise to an intermediate level of antibody concentration.

有一个迟滞期，抗体浓度缓慢上升至中间水平。

I've the intermediate level exam of Japanese.

我已经通过了日语的中级水平兰试。

We teach learners up to intermediate level in our centre.

我们中心将初学者教到中级水平。

This book is intended for readers of intermediate level.

这本书是写给中级水平的读者的。

The young man had passed the intermediate level exam of English.

这个年轻人通过了英语中级水平测试。