To this, the explanation of concerned staff of farming letter agency is: They are having imitate practice, these smother are to put tear bomb on be caused by artificially.

对此，农信社有关人员的解释是：他们在进行模拟演习，这些浓烟是人为投放催泪弹所致。

youdao

The death of Mr de Mello, with 23 others in a massive bomb blast last month, underlined how badly Mr Rumsfeld's strategy was working in practice.

ECONOMIST: America and the United Nations