We were given to understand that he was ill.

我们获悉他生病了。

《柯林斯英汉双解大词典》

As researchers come to understand more about the mechanism that keeps some people safe, that knowledge could be used to help those who become ill.

研究人员逐渐深入了解这种金葡菌不危害人体安全的机理，这些知识可能对患者有帮助。

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Consumer and investor protections were weakened and households took on risks that they often did not fully understand and could ill-afford.

消费者和投资者保护降低了，那些经常不能完全懂得并且无法负担这种风险的家庭承担了风险。

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For good or ill, I do understand the machinery of news.

BBC: Newtown overwhelmed by media

The Supreme Court on Thursday ruled 5-4 in favor of a mentally ill murderer who does not understand the reason for his execution.

NPR: High Court Blocks Mentally Ill Inmate's Execution

Our under-30s perceptively understand that all of the financial game playing bodes ill for their chances of getting Social Security when they retire.

FORBES: The Under-30s Should Demand an Opt Out of Social Security