This effect was imperfectly understood by designers at that time.
当时的设计者们没有完全理解这种效果。
...in a country whose language she spoke imperfectly.
在一个她不能完全掌握该国语言的国家里
2N-SING (动词的)未完成过去式,未完成过去时 In grammar, the imperfect or the imperfect tense of a verb is used to describe continuous situations or repeated actions in the past. Examples are 'I was reading' and 'they were eating'. (动词的)未完成过去式,未完成过去时
VERBS | ADVERBVERBS➤be不完美▸➤remain依然有待完善◇Our understanding of cancer remains imperfect.我們對癌症的瞭解依然有待提高。ADVERB➤highly, very極不完美;很不完善◇He spoke in very imperfect English.他操着一口非常不標準的英語。➤slightly稍欠完美◇These goods are slightly imperfect.這些貨物略有瑕疵。➤admittedly應該承認不夠完美◇What follows is an admittedly imperfect analogy...下面是一個確實不算恰如其分的類比⋯⋯