他在会议室一个不为人注意的犄角坐下来: he took his seat in an unobserved corner of the assembly room
免费: free of charge; cost free; free; gratis 短语和例子免费得到戏票 get a theatre ticket for free; 免费招待 entertain sb. freely; 免费搬运 free haul; 免费保养服务 after(-sale) service; 免费搭车 hitchhike; 免费公立学校 common sch
