@Marco_Piani i.e. Just because you try to prevent spread, and do in fact have LESS spread, doesn't mean it won't happen in practice.
@Marco_Piani，也就是说，仅仅因为你试图防止传播，而且实际上传播得更少，并不意味着它在实践中不会发生。
@Marco_Piani i.e. Just because you try to prevent spread, and do in fact have LESS spread, doesn't mean it won't happen in practice.
@Marco_Piani，也就是说，仅仅因为你试图防止传播，而且实际上传播得更少，并不意味着它在实践中不会发生。