A superconductor is a material that achieves superconductivity, which is a state of matter that has no electrical resistance and does not allow magnetic fields to penetrate. An electric current in a superconductor can persist indefinitely. Superconductivity can only typically be achieved at very cold temperatures. https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTXE483TB44cbkrQiIsgKaeIuaW1_X_ikG1wQ&s

Stellar!  🤭💞 ông luôn có thể làm cho mọi người cảm thấy được yêu quý và được chăm sóc.