adj.无效的，无能的，软弱的，达不到目的的

The new manager's attempts to boost morale were largely ineffectual, as employees remained disengaged.
新经理试图提高士气的努力大多收效甚微，因为员工们仍然缺乏积极性。
Despite taking medication, her headache persisted, indicating that the treatment was ineffectual.
尽管服用了药物，她的头痛仍持续存在，这表明治疗无效。
The protest against the policy change was ineffectual; the government implemented it anyway.
针对政策变更的抗议没有效果，政府还是照常实施了。
His attempts at humor during the presentation fell flat, proving to be ineffectual in lightening the mood.
他在演示中尝试幽默却没能引起共鸣，证明在调节气氛方面并不奏效。
The opposition party's criticism of the ruling party's policies were deemed ineffectual due to their lack of alternative proposals.
反对党对执政党政策的批评被认为无效，因为他们没有提出替代提案。
The coach's half-time pep talk was ineffectual; the team continued to play poorly in the second half.
教练在中场休息时的鼓舞讲话没有起到作用，球队在下半场的表现依旧不佳。
The customer service representative's apologies were ineffectual in resolving the customer's frustration over the delayed delivery.
客服代表的道歉对于解决客户因延迟发货而产生的不满并未起到实际作用。
The school's anti-bullying campaign proved ineffectual as incidents continued to rise.
学校的反欺凌活动被证明是无效的，因为欺凌事件仍在持续增加。
The new software update aimed at fixing bugs was largely ineffectual, with users still experiencing crashes.
旨在修复错误的新软件更新大部分未达到预期效果，用户仍会遇到程序崩溃的问题。
Her efforts to reason with the stubborn child were ineffectual; he refused to listen or妥协.
她试图与固执的孩子讲道理的努力没有成效，孩子拒绝听从或妥协。