Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
twice [twaɪs] adv два́жды
twice as much вдво́е бо́льше
twice a week два ра́за в неде́лю
she is twice your age она вдво́е or в два ра́за ста́рше Вас
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: