词汇	There is a bookbag
释义	There is a bookbag. 有一个书包。
随便看	standard deviations standard deviationSD standard deviation test standard deviation weight standard deviation weight fuzzy assessment standard devication standard device standard device byte standard dial standard dialect standard dialects standard diameter standard dictionary standard die Standard die components for plastics standard dimension of channel standard dimension ratio standard dimensions and structural drawing standard dimensions of navigation channel standard dimensions of the channel Standard discectomy standard disc filing system Standard dischargeable Li bittery group standard discharge condition standard discharge connection