Causing problems again and again, in a way that wears you down. The feeling is closer to annoying than to dangerous: a troublesome cough is one that will not go away, a troublesome student keeps interrupting, a troublesome neighbour keeps parking across your gate. Notice the 'keeps' in all of those — troublesome things are repeat offenders, not one-time disasters. You would not call a car crash troublesome; you would call the little rattle in the engine troublesome.

Causing problems again and again一次又一次造成問題， in a way that wears you down讓人漸漸感到疲乏。 The feeling is closer to annoying than to dangerous這種感覺比較接近『煩』，而不是『危險』： a troublesome cough is one that will not go awaya troublesome cough（惱人的咳嗽）是一直好不了的咳嗽， a troublesome student keeps interruptinga troublesome student（惱人的學生）是一直打斷上課的學生， a troublesome neighbour keeps parking across your gatea troublesome neighbour（惱人的鄰居）是一直把車停在你家門口的鄰居。 Notice the 'keeps' in all of those注意這些例子裡都有『一直』—— troublesome things are repeat offenders, not one-time disasterstroublesome 的東西是反覆出現的慣犯，不是一次性的大災難。 You would not call a car crash troublesome你不會把一場車禍叫做 troublesome； you would call the little rattle in the engine troublesome你會把引擎裡那個小小的異音叫做 troublesome。

The word sounds slightly formal or old-fashioned in speech. A British person might say it; most Americans in conversation would say 'a real pain' or 'annoying'.

The word sounds slightly formal or old-fashioned in speech這個字在口語裡聽起來有點正式、有點老派。 A British person might say it英國人可能會這樣說； most Americans in conversation would say 'a real pain' or 'annoying'但大多數美國人聊天時比較會說『a real pain』（真的很煩）或『annoying』（很煩人）。

It survives strongly in writing, especially in news and academic English — 'a troublesome question', 'troublesome side effects' — where it lets the writer signal difficulty without sounding emotional. It also carries a faint tone of the speaker being patient and above it all, which is why it can sound gently disapproving when used about a person.

It survives strongly in writing, especially in news and academic English但它在書面語裡活得很好，尤其是新聞和學術英文—— 'a troublesome question', 'troublesome side effects'像『a troublesome question』棘手的問題、『troublesome side effects』麻煩的副作用—— where it lets the writer signal difficulty without sounding emotional讓作者能表達出困難，卻不顯得情緒化。 It also carries a faint tone of the speaker being patient and above it all它還帶有一點點語氣，好像說話的人很有耐心、高高在上地看待這件事， which is why it can sound gently disapproving when used about a person這也是為什麼用在一個人身上時，聽起來會帶點溫和的不以為然。