fail to;cannot;haven't been able to ;

The guidance systems didn't work and the missile couldn't hit its target.
导航系统失灵,导弹未能命中目标。
来源:《柯林斯高阶英汉双解学习词典》British manufacturing failed to meet the crisis of the 1970s.
英国制造业未能经受住20世纪70年代危机的考验。
来源:《柯林斯高阶英汉双解学习词典》If homeowners can't keep up the payments, they face foreclosure.
业主如果未能按时交房贷,就会面临丧失抵押品赎回权的危险。
来源:《柯林斯高阶英汉双解学习词典》Even the successful flying boats proved, in the end, uneconomical.
即使是成功的水上飞机最终也未能盈利。
来源:《柯林斯高阶英汉双解学习词典》Radiation may damage cells in a way that was previously unforeseen.
辐射可能以一种我们过去未能预见到的方式破坏细胞。
来源:《柯林斯高阶英汉双解学习词典》Some beaches had failed to comply with European directives on bathing water.
有些海滩未能遵守欧洲有关浴场的指令。
来源:《柯林斯高阶英汉双解学习词典》They were charged with failing to have professional indemnity cover.
他们被指控未能提供职业保险保障。
来源:《柯林斯高阶英汉双解学习词典》He has failed to dissociate himself clearly and unambiguously from the attack.
他未能干净利落地同那起攻击事件撇清关系。
来源:《柯林斯高阶英汉双解学习词典》For failing to report the accident, his licence was endorsed.
由于发生事故未能报告,他的驾驶执照被注明违章。
来源:《柯林斯高阶英汉双解学习词典》
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