拓扑绝缘体的美在于它们的鲁棒性；它们的表面态受到对称性和拓扑的保护，使它们对某些类型的无序免疫。

Retire into yourself and ask yourself this question: Must I write？ If the answer is yes， then you must keep writing.

Your rising from bed every morning will give fear its chance to grow stronger just as it will afford faith its chance to blossom. You will make the choice to react to one or create the other.

英国大陆架在我们的能源安全中仍可发挥重要作用。