A number of companies have now made the high - temperature superconductors into tapes a few millimetres across.液氮是一种便宜而易得的商品,沸点是77K,我们利用它可以在实际应用中比较容易地冷却超导体.We may also look forward to the application of superconductors i...
Toughs can have critters or terrors as pets or companions.强者可以有野生动物或难缠生物作为宠物或夥伴.He felt willing to risk Injun Joe and all other terrors.他现在觉得就是遇到印第安-乔和什么别的危险也不怕.They suffered untold terrors in the dark and huddled togeth...