警方已大举搜捕抢劫金条的罪犯。 Police have launched a man-hunt for the bullion robbers.
正在搜捕该罪犯。 The hunt is on for the culprit.
搜捕工作证明是很困难的，因为人们看到的这只美洲狮常常是早上在一个地方，而晚上又在二十英里之外的另一个地方。 The search proved difficult, for the puma was often observed at one place in the morning and at another place twenty miles away in the evening.