请不要把菸灰弹入此处!
Cigarette Ash Forbidden
应该是：No Cigarette Ash
how about: No Cigarette Ash, please
小心地滑
Slippery Floor
应该是：Watch out, flippery floor
关怀弱势儿童
Care for Disadvantaged Children
应该是：Show your love and care for those less fortunate children.
how about: Show your love and care for those less fortunate children
不可回收
Non-Recyclable
文明机场
Airport of Superb Service
老弱病残孕」的坐椅 （on bus)
Seat for Disabled
当心碰头
Mind Your Head
应该是：Watch for xxx, e.g. overhead bar.