When someone is drowning, it's often silent and happens very quickly. But it can be prevented.
当有人溺水时，通常是无声的，而且发生得很快。但这是可以预防的。
'The tooth pain brings them in. Diabetes and hypertension are often silent diseases, ' says Edwidge Thomas, the nursing school's director of clinical practice affairs.
护理学院临床实践事务主任爱德威治•托马斯（EdwidgeThomas）说：“他们是因为牙疼才来看病的，而糖尿病和高血压的症状通常都不是那么明显。”
This is significant because lung cancer is often silent in its early stages and difficult to diagnose which is the stage when it could be treated effectively.
这是非常重要的，因为早期肺癌通常无症状，很难诊断，而这时期的治疗往往非常有效。
This is significant because lung cancer is often silent in its early stages and difficult to diagnose which is the stage when it could be treated effectively.
这是非常重要的，因为早期肺癌通常无症状，很难诊断，而这时期的治疗往往非常有效。
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