中文原文：

對英語，我只懂一點皮毛。

錯誤譯文：

I only have a smattering of the knowledge about English.

正確譯文：

I only have a smattering of English.

翻譯加油站：

smattering 在這里的意思是limited knowledge 或superficial knowledge，即“有限知識”或“表面知識”。初學者愛說My English is poor，以示自謙，其實不合英語習慣。不如說I only have a smattering of English更為地道。
a smattering of 后面一般跟一種語言。例如：我在巴黎逗留期間學了一點法語。I picked up a smattering of French during my stay in Paris.但是，a smattering of 還有a small number of 或a small amount of的意思，前者跟可數名詞，后者跟不可數名詞，具有“少量”或“一點兒”的意思。例如：她僅會一點兒英語單詞。She knows only a smattering of English words.

“懂得一點兒”和“懂點皮毛”，還可以譯為to know a little about sth。“一知半解”可以譯為to have a superficial knowledge of sth, to have a scanty knowledge of sth。例如：他們對公司如何運作僅有一知半解。They only have a scanty knowledge about how a company operates.

“所知甚少”可以用to know very little, not to know much, to have little knowledge等方式表示。例如：說老實話，我對西方文化所知甚少。To be honest, I knew very little about Western culture.

“一無所知”或“全然無知” 可以譯為 to be absolutely/completely/ quite/totally ignorant about/of sth 或to be completely in the dark。例如：這兩個人從來沒有互相見過面，而且對互相的工作全然無知。The two people never saw each other, and they were completely ignorant of the other's work.

“被蒙在鼓里”可以譯為to be kept completely in the dark。例如：經理計劃將公司出售，但是股東們被蒙在鼓里。The manager planned to sell the company, but the shareholders were kept completely in the dark．