profitless
用法要点
句型搭配
profitless 通常用作表语或定语，描述事物缺乏效益，常见于否定或批评语境，如 'It is profitless to...' 或 'a profitless venture'。
介词用法
profitless 常与介词 'for' 或 'to' 连用，表示对某人或某事无益，例如 'profitless for the company' 或 'profitless to pursue'。
语域说明
profitless 多用于正式或书面语，如商务、学术报告，日常口语中较少见，可用 'pointless' 或 'useless' 替代以更自然。
基础例句
The long meeting was completely profitless; we didn't reach any decisions.
这次漫长的会议完全徒劳无功，我们没做出任何决定。
He realized his efforts to fix the old car were profitless and gave up.
他意识到修理那辆旧车的努力是白费力气，于是放弃了。
It's profitless to worry about things you can't change.
为无法改变的事情担心是徒劳无益的。
Their argument was profitless and only made everyone upset.
他们的争论毫无益处，只会让每个人都不开心。
高级例句
The market analysis proved profitless, as it failed to predict the economic downturn.
市场分析被证明是徒劳的，因为它未能预测经济下滑。
In academic circles, profitless debates often hinder progress in research.
在学术界，无益的争论常常阻碍研究进展。
The company's expansion into that region was a profitless venture due to regulatory issues.
由于监管问题，公司在该地区的扩张是一次无利可图的冒险。
Investors deemed the new policy profitless for long-term growth and shifted their funds.
投资者认为新政策对长期增长无益，因此转移了资金。
高频搭配
verb
adjective
noun
adverb
preposition
phrase
常见错误
错误用法中 'to do' 冗余，因为 'profitless' 已直接描述项目性质，正确用法应简洁表达。
错误用法将 'profitless' 误用于描述人的感受，它应修饰事物如努力或活动，正确用法需明确主语。
近义词辨析
pointless
pointless 强调缺乏目的或意义，常用于日常语境；profitless 更侧重没有利润或实际好处，多用于正式或经济场景。
Arguing is pointless. (强调无意义) vs. The investment was profitless. (强调无收益)
unprofitable
unprofitable 特指财务上无利润，是 profitless 的近义词，但 profitless 含义更广，可指任何无益的事。
The business is unprofitable this year. (财务上) vs. The discussion was profitless. (泛指无好处)