How to Use "serous" with Example Sentences

1. Or we ; re gong to have serous probems .
2. Cytological analysis of malignant serous cavity effusion with eosinophilia .
3. Central serous chorioretinopathy ; fundus fluorescein angiography ; observation .
4. It was the only serous question he had ever asked me .
5. Though we suffer from serous natural calamities , we are sure to overcome all difficulties .