pd.

英 美
  • (=period)期间,时期,时代
  • convergence n.收敛;汇聚;汇合点
  • data n.数据;资料名词datum的复数形式.
  • packet n.小袋;邮船;数据包
  • protocol n.外交礼仪;草案;协议;规章制度;【医】记录;科学实验报告
名词 pd:
  1. a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry