1. On speculation regarding the diagnosis of the injury, this has never been an issue. �����˲��������IJ²⣬���������һ�������۵����⡣
2. In fact, it had ultimately need AIDS test results, there is no basis for speculation is not reliable. ��ʵ���Ƿ���˰��̲����ջ�����Ҫ�������������ݵIJ²��Dz��ɿ��ġ�
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n.
1. a message expressing an opinion based on incomplete evidence
2. a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence)
3. an investment that is very risky but could yield great profits
4. continuous and profound contemplation or musing on a subject or series of subjects of a deep or abst