P.A.造句怎么写

2、call out somebody's name over a P.A. system.

4、Before long an emergency announcement came over the P.A. system: "This hotel is constructed to be absolutely earthquake-proof."

6、有关风媒传粉是在昆虫稀缺或靠不住的时候才启用的论述，见Cox,P.A.1991.

3、The Selection of Reference Genes in Chlamydomonas reinhardtii P.A. Dangeard by Real-Time Quantitative PCR

1、P.A. [personal account; private account ]

5、When they published it, it was big news for the high school - it was even announced on the P.A. system.