1
needlessly + adj.
The rules are needlessly strict.
这些规定不必要地严格。
不必要地；无用地
先理解核心含义，再看它在真实句子里的用法。
不必要地；无用地
without need
The rules are needlessly strict.
这些规定不必要地严格。
不必要地。
In a needless manner.
不必要地；超出需要的程度
To a degree or extent beyond what is needed.
无必要地。
Without need.
She worried needlessly about the exam results.
她为考试结果不必要地担心。
The instructions were needlessly complicated.
这些说明不必要地复杂。
He needlessly spent a lot of money on new equipment.
他不必要地花了很多钱买新设备。
The rules are needlessly strict.
这些规定不必要地严格。
She worried needlessly about the test.
她为考试不必要地担心。
The report was needlessly delayed.
这份报告被不必要地耽搁了。
Not this
The instructions were needless complicated.
Use this
The instructions were needlessly complicated.
needless 是形容词，不能修饰形容词 complicated；修饰形容词或动词要用副词 needlessly（不必要地）。
Not this
This extra step is needlessly.
Use this
This extra step is needless.
系动词 is 后接表语，需用形容词 needless（不必要的），而 needlessly 是副词，不能作表语。
Not this
Needlessly to say, we missed the bus.
Use this
Needless to say, we missed the bus.
Needless to say 是固定搭配，意为“不用说”；虽然 say 是动词，但此搭配中必须保留形容词 needless，不能改成副词 needlessly。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
不必要地复杂
The application process was needlessly complicated.
申请流程不必要地复杂。
不必要地长
The wait at the clinic was needlessly long.
在诊所等候的时间长得没有必要。
不必要地昂贵
The new model is needlessly expensive for most buyers.
对大多数买家来说，这款新车型贵得不必要。
不必要地残酷
The punishment was needlessly cruel.
这种惩罚不必要地残酷。
无谓地担心
Don't worry needlessly about things you cannot change.
不要无谓地担心你无法改变的事情。
无谓地死去
Millions of people die needlessly from treatable diseases.
数百万人因可治疗的疾病而无谓地死去。
Use needlessly naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把need（需要）和less（少）放一起：需要少到没有，就是“不必要地”多此一举。
语域：neutral 常见场景：书面说明、评论文章、日常对话 needlessly 是副词，表示“不必要地、无用地”，语体偏中性。通常多用于书面说明或评论中，在日常对话中也可使用，不会过于生硬。
heedlessly 与 needlessly 押韵（重读元音及之后完全相同）；endlessly、hopelessly、carelessly、relentlessly 虽都有 -lessly 拼写，但重读元音不同，并不押韵。
Dictionary facts from ECDICT, WIKTIONARY.