1.禁止吸烟 No smoking!
2.这里可以停车
Parking is allowed here./You can park here
no smoking
The second one is more interesting. In North America, we only see sign No Parking. Whenever there is no sign, it means we can park.
We see parking sign only in parking lot. Usually, the sign is Parking or P.
1.禁止吸烟:No smoking(Don't smoke)
2.这里可以停车:You can park you car here(Parking allowed )
no smoking here
if you use it in oral english ,you had better say : do you mind if you not smoke here ? thank you ! that is a polite way
parking allowed
1 No Smoking
2 you can park here(parking allowed)
1.No smoking
2.Can park the car here