Without microscopes and other modern equipment, attempts to teach science were futile.
有显微镜及其他现代化设备, 教授自然科学是不会有成果。
He is a futile sort of person.
他是一个有用人。
They were killed, to the last man, in a futile attack.
因为进攻失败, 他们全部被杀, 无一幸免。
Their efforts to revive him were futile.
他们对他抢救无效。
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