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1·His behaviour was marked by an oddly prankish streak and outbursts of genuine jollity.

他的行为玩世不恭，并且以真挚欢快的情感爆发为特点。

2·Active from May to late June, when it claims to have disbanded, LulzSec's hallmark was prankish attacks accompanied by public mockery.

一直从五月活跃到七月末，它忽然宣布解散。LulzSec特点就是在公众的嘲笑下恶作剧般的攻击。