O stands for offering services to help people stop smoking. W is for warning people about the dangers of tobacco.
O代表提供服务以帮助人们戒烟。W是警示人们烟草的危害性。
The W. H. O. has an influenza warning system in which phase six means that a pandemic is taking place.
世卫组织拥有一套流感预警机制，六级意味着流感病毒的大规模流行。
The W. H. O. has an influenza warning system in which phase six means that a pandemic is taking place.
世卫组织拥有一套流感预警机制，六级意味着流感病毒的大规模流行。
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