seasonal testing

• 季节性检验

seasonal testing的用法和样例：

例句

1. The supervision of the customs and the inspection of commodities should also be reinforced at seasonal frontier ports.
   季节性的边境口岸也要加强海关监管和商品检验。
2. Seasonal vaccines are traditionally produced from high-growth reassortant viruses, which have been derived empirically using well-established techniques.
   季节性流感疫苗是由复制迅速的重组病毒生产的，这种传统的方法是经过实践检验形成的成熟技术。