Twelve extremely good-looking, smooth young men have been picked as finalists.12名特别漂亮精明的青年男子被选为参加决赛的选手。He was smart and well groomed but not good looking.他仪容整洁，穿戴漂亮，就是人长得不好看。His friend was less good-looking, but a lot mo...
This study presents a new single - stage single - switch PFC flyback DC converter.文章研究了一种新型 单级 单开关PFC反激变换器.A novel multi - output forward - flyback converter with secondary side post regulation is proposed.详细分析了一种运用了后级调整...
You may not enter the security area without authorization.未经批准不得进入警戒地区。Formal authorization for the trip was given last week.这次行程上周得到正式批准.Anglers are required to obtain prior authorization from the park keeper.垂钓者必须事先得到公...