副词 flat out:

1. in a blunt direct manner

2. at top speed

flatadj.平坦的；扁平的；单调的；断然的；[音乐]降音的；气不足的adv.平直地；直截了当；低于标准音高地n.<英>公寓；平面部分；[音乐]降半音；泄气轮胎v.变平；降调；住公寓flatcapn.平顶帽；伦敦市民

1. The plan must be carried out with maximum speed and discretion.
   该计画必须以最高的速度且审慎地执行。
2. In sum, the highest-quality replicable sounds would crowd out the poorer ones.
   总之，可复制的声音之间发生了惨烈的竞争，结果品质最高的胜出。

1. I told her straight out that she was wrong.
   我坦白地告诉她，她错了。
2. Frankly, allow me to know your expertise and true interest so that accordingly I can work out the options for you and can allocate web site projects to you.
   坦白地说，能否更真实地告诉我你真实的兴趣和能力，从而我可以对你的工作做出选择，分配合适的网站工作给你。
3. I tell him straight out that I think he is lying.
   我直率地对他说我认为他是在撒谎。
4. When Ann entered the beauty contest,her little brother told her straight out that she was crazy.
   当安报名参加选美赛时，她的小弟弟直率地说她简直是疯了。