超声心动图检查也可以引起错误的判断。剧烈运动可以引起短暂的左心室功能异常。
An echocardiogram also might be misleading. Vigorous exercise can bring on transient abnormalities in the functioning of the left ventricle.
当载入类时，如果发生一个错误，返回该错误引起的异常。
Returns the exception that was raised if an error occurred while attempting to load the class.
方法抛出该异常表示一个由系统级错误或者因为会话bean调用引起的失败。
RemoteException - Thrown when the method failed due to a system-level failure or when invoked on a session bean.
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