用這種方法控制你的狗不起作用。This is an ineffective method of controlling your dog.既然對(duì)你起作用，這就是個(gè)明智的決定。This was a good decision inasmuch as it worked for you.該衛(wèi)星自從兩年前發(fā)射以來(lái)一直沒(méi)起作用。The satellite had been inactive since its launch two years ...