1. In most times and places they were ineffectual. 大多数时间和场合下是无效的。
2. He watched the flying fish burst out again and again and the ineffectual movements of the bird. 他看着飞鱼一再地从海里冒出来，看着那只鸟儿的一无效果的行动。
3. Dissertations that sound choppy or stuttered are for the most part ineffectual and will most likely fail to impress. 论文的声音断断续续或结结巴巴的大部分是无效的，并很可能将无法留下深刻的印象。
英英解释
adj.
1. not producing an intended effect
2. producing no result or effect
3. lacking in power or forcefulness
