During commercials, an overlay will appear at the bottom of the screen, prompting viewers to press a button to request a free sample ororder a catalogue.
在商业广告播放时，一个弹窗将会出现在屏幕下方，促使观众按动按钮，以索要免费样品或订阅产品目录。
2
During commercials, an overlay will appear at the bottom of the screen, prompting viewers to press a button to request a free sample ororder a coupon or a catalogue.
在广告期间，屏幕底部会出现一条信息，提示观众按下按钮以请求获得免费样品或订购优惠券或目录。
3
The dual notion is called "monotone" or "order-preserving".