vary;differ 各國(guó)的國(guó)情～很大。National conditions vary greatly./白天和晚上的氣溫～很大。There is a wide difference in temperature between day time and night./城市和農(nóng)村的人均收入～懸殊。Average per-capita incomes in urban and rural areas are widely different (or poles apart)./他倆的年齡～無(wú)幾。They two are of about the same age.