1. People are vigilant on issues that interest them. �����������Ȥ���������Ǿ���ġ�
2. The laws aid those who are vigilant, not those who sleep upon their rights. ���ɰ�����Щʱ�̾������ˣ���������Щ����Ȩ����˯������ˡ�
3. However, health officials around the world warned the virus is still spreading and everyone needs to remain vigilant. Ȼ����������ص�������Ա���Ǿ���˵�������ڴ�����ÿ��������Ҫ���־��衣
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adj.
1. carefully observant or attentive; on the lookout for possible danger