A quartet is playing tonight.

今天晚上有一个四重唱表演小组的演出。

Can say, defend quadruply set out completely from the point of view that protects player interest, arrive from Zhang name code resist trojan virus, to the player overall safety assures.

可以说，四重防护护玩家利益的角度出发，账号密到抵御木马病毒，给玩家面的安。