显然，希尔是来严密监视约翰逊的，以确保他不做什么过激的事。
It was obvious Hill had come over to keep tabs on Johnson and make sure he didn't do anything drastic.
由于银行开始严密监视从未知电脑处发出的转账申请，黑客大约从前年开始劫持受害者的IP地址。
Since banks have started watching out for transfer requests from unknown computers, hackers have in the past year or so begun hijacking their victims' own IP addresses.
参与者被询问他们的医疗史、饮食和药物使用情况并通过定期内窥镜检查和组织活检严密监视疾病进展病征。
The participants were interviewed about their medical history, diet and medication use and were closely monitored for signs of disease progression through regular endoscopies and tissue biopsies.
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