catch sb. in the (very) act of doing 是什么意思?

catch sb. in the (very) act of doing 是什么意思? 英语翻译 catch sight of catch sb.doing sth. catch sb.cheating in the act of faxilitating communication是什么意思? join sb in doing sth 是什么意思? she act in the belief that she was doing well catch sb by the 请用catch the eye of sb.造句 the Act of Union of 1801的汉语是什么意思 in the habit of doing 英语翻译The Inspector General Act of 1978（the Act）established In hear of sb doing