the sound of pigeons cooing鸽子咕咕的叫声Pigeons navigate less accurately when the earth’s magnetic field is disturbed.地球磁场受到干扰时，鸽子的道航能力就会变得不准确。The new vicar's a Marxist that'll set the cat among the pigeons!新来的牧师是马克思...
The spilled liquid gasoline quickly evaporates, adding more HC pollution to the air.溅落的液态汽油迅速地蒸发, 给空气增添了更多的HC污染物.Hydrocortisone ( HC ), 11� � , 17α, 21 - trihydroxypregn - 4 - ene - 3,20 - dione, is an important grucocor...