Ultracet是一种镇痛药(含acetaminophen, tramadol hydrochloride)ultraadj.超；过激的；极端的n.过激论者；急进论者ultrafine cobalt超细钴粉ultrafine powder超细粉ultra_filtration超滤ultrafine denier超细旦ultra-rightistn.极右分子；极右派Ultra filtratlon超滤ultramicroscopicadj.超显微的Ultrasound graph超声ultramodern girl超摩登女郎ultrashort pluse超短脉冲

1. Electromagnetically induced transparency and slow light in ultracold Bose gas were investigated.
   摘要研究了超冷玻色气体中的电磁感应透明现象。
2. Several research groups are in a race to recreate it in the laboratory in microscopic specks of ultracold gas.
   几个研究小组正相互竞争，要在实验室超冷气体的微粒里重现这种状态。