I just played badly. It wasn't nerves.是什么意思？

I just played badly. It wasn't nerves.

我只是打得很糟，不是紧张造成的。

just

adv. 刚才，仅仅，只是，正好，刚要；adj. 公正的，合理的，恰当的，合法的，正确的；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

played

v. 演奏( play的过去式和过去分词 )，演出，参加比赛，捉弄；

例句
The band played the Czech anthem.
乐队演奏了捷克国歌。

badly

adv. 非常，在很大程度上，坏，拙劣地，不利地，有害地；

例句
He was badly concussed, the glass leaving two angry cuts across his forehead.
他遭受了严重的脑震荡，脑门上留下的两道被玻璃划破的口子已经红肿。

it

pron. 它，他，正好是所需的，事实[情况]；n. <美俚>傻瓜，笨蛋，<俚>绝妙的人，理想的东西，登峰造极；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

nerves

n. 神经质，神经紧张，神经( nerve的名词复数 )，勇气，神经过敏，鲁莽；

例句
Other subjects covered included nerves and how to overcome them.
所涉及的其他主题包括焦虑及如何克服。