Substance X in turn donates its electron to an iron - containing protein called ferredoxin.X物质又将它的电子转移给一种含铁的蛋白质,称为铁氧还蛋白.He frequently donates large sums to charity.他常常向慈善机构捐赠大笔钱款。He frequently donates large sums to chari...
窗户外边是一块草地，高高的草随风摇摆。The windows overlooked a lawn of tall waving grass.春天，草地上开满了黄水仙。In the spring, the meadow is a mass of daffodils.我们说话的时候，他们家的4个孩子在草地上玩侧手翻。Their four children turn cartwheels in the grass as we talk....