What's the meaning of '@'?How we say '@' in Chinese?

x��U�RA����&~ ����V��Lf*Cwj��Tv�
oQT R���*!L��Lw'�ow�U��7.�M��{�眩I�ǧ\"!��,%�c3��!q/1�GQI��c��� �D:��h���c���?~3\�p�$ �]b<óE���f�d�XUOd�1ݽ�~� A0���6x��x���}%]���Ϛ�[Y_��߷�rL�<
.������괢6N�Huz�󄍛_�O��X�