don't shine at tennis.
我不擅长打网球.
I am no good at it.
我对它不擅长.
My sister is no good at arithmetic.
我妹妹不擅长算术.
Lack of talent or ability.
不擅长,笨拙缺乏天资或能力
I've never learnt the trick of making friends easily.
我一向不擅长轻易交上朋友.
I wouldn't say I was proficient at computer programing.
我看我并不擅长计算机编程.
I'm not very good at hacking but I'll give it my best.
我不擅长安装但是我会尽力.
He's not very good at description.
他不大擅长描写叙述.
He is not a good hand of write.
他不是一个擅长书法的人.
Not in my line.
这不是我所擅长期的