The World Health Organization team investigating the origins of coronavirus has visited a Wuhan laboratory that has become a focal point of theories suggesting a leak was responsible for the pandemic.
世界卫生组织(WHO)调查新型冠状病毒(SARS-CoV-2)起源的小组参观了武汉的一个实验室，有多种理论称导致此次大流行的病毒是从该实验室泄露出来的。
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