petrovsky

petrovsky

美 　英

• 网络佩特罗夫斯基；彼得洛夫斯基镇

例句

Petrovsky said it would be six to eight weeks before results would verify whether a vaccine was effective.

彼得罗夫斯基说，他们尚需6到8个星期才能检验出疫苗是否有效。