帮我解释并造句啊

1.荒唐可笑的; 沉闷无聊的; 毫无价值的; 只能骗那些轻信的人的
2.
3.美口 未带女伴参加交际会
4
5.易被取笑的对象
6.

1。毫无价值的（贬）
In my opinion,the president-to-be's promise that we'll enjoy a economic boom is just for the birds.
2.肮脏的钱,不义之财
Listen.stop that stupid way of making money.Filthy rich will lead you nowhere but the prison.
3.未带女伴参加交际会
4.倒下,失败(引申)
(金山)I'm afraid the play will fall flat.
我担心这个剧会失败。
She fall flat on her face as she get out of the car.
她一下车便直挺挺地脸朝下倒了下去。
Stepping forward to receive my award what do I do but fall flat on my face.
我走上前去领奖，却没料到摔趴在地上。
If he tries to tackle that kind of market before he's made a thorough study.He'll fall flat on his face.
如果他事先不透彻研究市场，就想处理那种市场问题，那他必败无疑。
5.认为可追逐、嘲弄的人或物
(金山)With his fat,round face,the mayor was fair game for the cartoonists.
市长因长有一张肥胖的圆脸成了漫画家描绘、夸张的对象。
The private lives of film stars shall not be considered as fair game for newsp