whilst

conj. 当...的时候

whereas, whereby, wherein, whereof, whereupon, wherever, wherewithal, whet, whether, whether...or, whether...or not, whetstone, whew (also phew), whey, which, whichever, whiff, while, while away, whilist, whim, whimper, whimsical, whimsicality, whimsically, whimsy, whin, whine, whinny, whip, whip-round, whipcord, whiplash, whipper-in, whipper-snapper, whippet, whipping, whipping cream, whipping-boy, whippy,