a bed of coal的用法和样例：
- A coal miner's work is not a bed of roses.
- The machine rests on a bed of concrete.
- The statue rests on a bed of concrete.
- Marriage is not always a bed of roses.
- For the last few months, he has been on a bed of thorns.
a bed of coal的相关资料：
a a theoretical analysis/approach/debate/model A well-/much-/widely-travelled journalist a.Perform on-going TPC services. Ceriificate. a short/harsh/bitter/nervous/hearty laugh A Non-Euclidean Geometry Electronic Drawing-board a medical/dental/routine/thorough check-up a meaningful relationship/discussion/experience A bird/ sparrow twitters/chirps/ chirrups. a perceptible change/increase/decline/impact a popular tourist attraction/destination/resort