wǒ / duì / zhè mén / xué kē / zhǐ / liǎo jiě / yì diǎn / pí máo / hái / xū yào / xì tǒng / de / xué xí

我对这门学科只了解一点皮毛，还需要系统地学习。

I only have a superficial understanding of this field and still need to study it systematically.